🛠️ 免费在线工具

📄

.htaccess Generator - Create Apache Config Free

Free online .htaccess generator - Create Apache .htaccess files for redirects, security, and performance

🔧

1RM Calculator Calculator — Free Online Tool

Free 1RM Calculator Calculator — 1RM Calculator online tool.

📊

401k Calculator - Free Online Tool

Calculate how much your 401k will grow by retirement. Factor in employer match, contribution limits, and investment returns.

🧪

A/B Test Calculator

Free A/B Test Statistical Significance Calculator - Determine if your A/B test results are statistically significant. Calculate p-value, confidence le

🔧

AI Avatar Maker - Create Custom Avatars Free

Free online AI avatar maker - Create custom avatars and profile pictures

🖼️

AI Background Remover - AI 智能抠图

AI 图片背景移除工具 - 一键抠图，智能识别前景，免费在线使用

🎨

AI Banner Generator - Create Custom Banners Free

Free online AI banner generator - Create custom banners for social media, websites, and marketing

📊

AI Chart Generator - Create Charts & Graphs Free

Free online AI chart generator - Create beautiful charts and graphs from your data

🖼️

AI Collage Maker - Create Photo Collages Free

Free online AI collage maker - Create photo collages easily

🎨

AI Color Palette - AI 配色生成

AI 配色方案生成器 - AI 智能生成和谐配色方案，支持多种配色规则

🎨

AI Colorizer - Colorize Black & White Photos Free

Free online AI colorizer - Add color to black and white photos using AI

🔧

AI Copywriter - AI 文案生成器

AI 文案生成器 - 输入产品信息，AI 自动生成营销文案、广告语、社交媒体帖子

🔧

AI Face Blur - Blur Faces Automatically Free

Free online AI face blur - Automatically detect and blur faces in images for privacy protection

🖼️

AI Image Alt Text Generator

AI 图片描述生成器 - 上传图片自动生成 Alt Text 和图片描述，提升 SEO 和无障碍访问

🔍

AI Image Upscaler - Enhance Images Free

Free online AI image upscaler - Enhance and upscale images using AI without losing quality

🎨

AI Logo Generator - Create Custom Logos Free

Free online AI logo generator - Create custom logos for your brand instantly

🔍

AI Object Detector - Detect Objects in Images Free

Free online AI object detector - Detect and identify objects in images using AI

🖼️

AI Photo Editor - Edit Photos with AI Free

Free online AI photo editor - Edit photos with AI-powered tools

🎨

AI QR Code Art - Create Artistic QR Codes Free

Free online AI QR code art generator - Create artistic QR codes with colors and styles

🔍

AI SEO Analyzer - AI SEO 分析

AI SEO 分析工具 - 输入 URL 或文本，AI 分析 SEO 评分、关键词密度、可读性等指标

✏️

AI Sketch Converter - Convert Photos to Sketches Free

Free online AI sketch converter - Convert photos to pencil sketches using AI

🎤

AI Speech to Text - Voice Typing Free

Free online AI speech to text converter - Convert voice to text using browser speech recognition

🎨

AI Style Transfer - Apply Artistic Styles Free

Free online AI style transfer - Apply artistic styles to your photos using AI

📝

AI Text Summarizer - AI 文本摘要

免费在线 AI 工具 - ai text summarizer - 智能处理，无需注册，即开即用

🔊

AI Text to Speech - Convert Text to Voice Free

Free online AI text to speech converter - Convert text to natural sounding speech, download as MP3

🖼️

AI Thumbnail Maker - Create YouTube Thumbnails Free

Free online AI thumbnail maker - Create eye-catching thumbnails for YouTube, social media

🌍

AI Translator - AI 翻译工具

AI 翻译工具 - 支持多语言实时翻译，中英日韩法德等语言互译

🔤

ASCII Converter - Convert Text to ASCII Free

Free online ASCII converter - Convert text to ASCII codes and vice versa

🔧

Acceleration Calculator

Free online Acceleration Calculator

📢

Ad Copy Generator

Free online Ad Copy Generator

🎲

Advanced Dice Roller - Free Online Tool

Roll any combination of dice — d4, d6, d8, d10, d12, d20, d100. With modifiers, history, and statistics.

📊

Advertising ROI Calculator - Free Online Tool

Free Advertising ROI Calculator - Measure the return on investment of your ad campaigns. Calculate ROAS, profit, and break-even metrics for any advert

🔧

Affirmation Generator - Free Online Tool

Generate positive daily affirmations for confidence, health, success, and self-love. Customize by category.

🔧

Age Calculator Calculator — Free Online Tool

Free Age Calculator Calculator — Calculate age calculator quickly and accurately.

🔧

Age Calculator — Free Online Tool

Free Age Calculator — Calculate your exact age in years, months, weeks, days, and even seconds.

📦

Amazon Fba Calculator

Free online Amazon Fba Calculator

📋

Amortization Calculator - Free Online

Generate a complete amortization schedule for any loan. See how each payment splits between principal and interest.

📈

Annuity Calculator - Free Online Tool

Calculate annuity payments and compare annuity options.

🔍

AooPower Tool Search — Free Online Tool

Search all 450+ free online tools on AooPower. Find calculators, converters, generators, formatters and more instantly.

📝

Apa Formatter

Free online Apa Formatter

📷

Aperture Calculator - AooPower

Calculate aperture values, f-stops, and depth of field.

🔌

Appliance Cost Calculator - Free Online Tool

Calculate the annual electricity cost of any appliance based on wattage, hours of use, and local rates.

📦

Archive Size Estimator

Free online Archive Size Estimator

⭕

Area of Circle Calculator — Free Online Tool

Free Area of Circle Calculator — Calculate area of circle quickly and accurately.

✂️

Aspect Ratio Calculator - AooPower

Calculate crop dimensions.

📐

Aspect Ratio Calculator — Free Online Tool

Free Aspect Ratio Calculator — Aspect Ratio online tool.

💾

Audio Bitrate Calculator - AooPower

Calculate audio bitrate.

🎵

Audio Converter - Convert MP3, WAV, OGG Free

Free online audio converter - Convert MP3, WAV, OGG, FLAC audio files between formats instantly

📁

Audio Format Converter - AooPower

Convert audio formats.

📊

Audio Frequency Analyzer - AooPower

Analyze audio frequencies.

⚖️

Audio Normalizer - AooPower

Normalize audio levels.

🔄

Audio Phase Checker - AooPower

Check audio phase.

🎤

Audio Recorder - Record Voice Online Free

Free online audio recorder - Record voice and audio directly in browser, download as MP3 or WAV

🛡️

Auto Insurance Calculator - Free Online Tool

Estimate your auto insurance costs based on vehicle and driving history.

🚗

Auto Insurance Comparison - Free Online Tool

Compare auto insurance quotes and coverage options.

🚗

Auto Loan Calculator 2026 - Car Payment Calculator

Free auto loan calculator to estimate your monthly car payment. Calculate car loan with interest, trade-in value, and down payment.

🔧

Avatar Maker - Create Custom Avatars Free

Free online avatar maker - Create custom avatars and profile pictures

📊

Average Calculator - AooPower

Calculate average/mean.

🍺

BAC Calculator - Free Online Tool

Estimate your Blood Alcohol Content (BAC) based on drinks consumed, body weight, gender, and time elapsed.

⚖️

BMI Calculator (Metric) - Free Online Tool

Calculate your Body Mass Index (BMI) using metric units. Enter height in cm and weight in kg for instant BMI results with health category.

⚖️

BMI Calculator — Free Online Tool

Free BMI Calculator — Calculate bmi quickly and accurately online.

🔥

BMR Calculator - Calculate Basal Metabolic Rate Free

Free online BMR calculator - Calculate Basal Metabolic Rate and daily calorie needs

🎵

BPM Tapper - AooPower

Tap to find BPM.

🔧

Baby Name Finder

Free online Baby Name Finder

🔧

Baby Name Generator

Generate baby name ideas! Browse popular names by origin, meaning, and style. Get inspired with random name suggestions for boys, girls, and gender-ne

✂️

Background Remover - Remove Image Background Free

Free online image background remover - Remove image backgrounds automatically with AI, create transparent PNGs

🔗

Backlink Checker - 外链检查工具

免费在线检查工具 - backlink checker - 快速检测分析

🔧

Baking Calculator - Free Online Tool

Free Baking Calculator - Calculate precise baking ratios, pan size conversions, altitude adjustments, and ingredient substitutions. Essential tool for

🔄

Balance Transfer Calculator - How Much Can You Save?

Free Balance Transfer Calculator - See how much you can save by transferring credit card balances. Compare 0% APR offers, calculate fees, and find you

📡

Bandwidth Calculator

Free online Bandwidth Calculator

🎨

Banner Generator - Create Custom Banners Free

Free online banner generator - Create custom banners for social media and websites

📊

Barcode Generator - Free Online Tool

Free online barcode generator - Create barcodes in Code128, EAN-13, QR Code and more formats instantly

🔐

Base64 Encoder - Base64 编码器

免费在线编码解码工具 - base64 encoder - 快速编码解码转换

🔋

Battery Life Calculator — Free Online Tool

Free Battery Life Calculator — Calculate battery life quickly and accurately.

📖

Bibliography Maker

Free online Bibliography Maker

🔢

Binary Converter - Convert Binary, Decimal, Hex Free

Free online binary converter - Convert between binary, decimal, hexadecimal, and octal

🔢

Binary Hex Octal Converter - Convert Number Systems Free

Free online binary, hex, octal converter - Convert between number systems instantly

🔧

Bitcoin Calculator - Convert BTC to USD Free

Free online Bitcoin calculator - Convert BTC to USD and calculate Bitcoin profits

❤️

Blood Pressure Calculator - Free BP Category Checker

Free Blood Pressure Calculator - Check your blood pressure category, understand systolic and diastolic readings, and get health recommendations based

🩸

Blood Type Calculator - Predict Child Blood Type Free

Free online blood type calculator - Calculate possible blood types for children based on parents

🔧

Blue Hour Calculator - AooPower

Calculate blue hour times.

📏

Body Fat Calculator — Free Online Tool

Free Body Fat Calculator — Calculate body fat quickly and accurately online.

📊

Body Fat Percentage Calculator 2026 - BFP Calculator

Free body fat percentage calculator to estimate your body fat. Calculate BFP with waist, neck, and hip measurements.

📏

Body Surface Calculator — Free Online Tool

Free Body Surface Calculator — Body Surface online tool.

🏋️

Body Type Calculator - Ectomorph, Mesomorph or Endomorph

Free Body Type Calculator - Determine your body type (ectomorph, mesomorph, endomorph) based on measurements. Get personalized exercise and nutrition

🧬

Body Type Quiz

Free online Body Type Quiz

🔧

Bokeh Calculator - AooPower

Calculate bokeh quality.

📈

Break Even Point

Free online Break Even Point

📊

Break-Even Calculator - Free Break-Even Point Analysis

Free Break-Even Calculator - Calculate the break-even point for your business. Find how many units you need to sell or revenue required to cover costs

🔧

Breathing Exercise - Free Online Tool

Follow guided breathing patterns like 4-7-8, box breathing, and more for stress relief and relaxation.

📊

Budget Calculator — Free Online Tool

Free Budget Calculator - Create a monthly budget, track income and expenses, and see where your money goes.

📝

Bulk File Renamer - 批量重命名

批量文件重命名工具 - 支持前缀后缀、编号、替换、正则等多种重命名规则

📐

Bulk Image Resizer - 批量图片缩放

免费批量处理工具 - bulk image resizer - 支持批量操作，提高工作效率

🖼️

Bulk Image to WebP - 批量转 WebP

批量图片转 WebP 工具 - 一键将 JPG/PNG 批量转换为 WebP 格式，大幅减小文件体积

🔥

Burnout Assessment - Free Online Tool

Assess your burnout risk across emotional exhaustion, depersonalization, and personal accomplishment.

💼

Business Card Maker

Free online Business Card Maker

🔧

Business Insurance Calculator - Free Online Tool

Calculate business insurance needs for small businesses.

🔧

Business Loan Calculator - SBA & Commercial Loan Calculator

Free Business Loan Calculator - Calculate monthly payments, total interest, and amortization for SBA loans, term loans, and lines of credit. Compare l

📈

CAGR Calculator - Calculate Compound Annual Growth Rate Free

Free online CAGR calculator - Calculate Compound Annual Growth Rate

📜

CD Calculator - Calculate Certificate of Deposit Returns

Free online CD (Certificate of Deposit) calculator - Calculate CD returns and interest

💲

CPC Calculator - Free Online Tool

Free CPC Calculator - Calculate Cost Per Click for PPC advertising campaigns. Convert between CPC, CTR, CPM, and total cost. Optimize your Google Ads

📢

CPM Calculator - Free Online Tool

Free CPM Calculator - Calculate Cost Per Mille (cost per 1,000 impressions) for your advertising campaigns. Find CPM, total cost, or impressions from

🎬

CSS Animation Generator - CSS 动画生成器

CSS 动画生成器 - 可视化创建 CSS 动画和过渡效果，一键复制代码

📦

CSS Box Shadow Generator

免费在线生成器 - box shadow generator - 一键生成，简单好用

📐

CSS Flexbox Generator

免费在线生成器 - flexbox generator - 一键生成，简单好用

🎨

CSS Generator - Generate CSS Code Free

Free online CSS generator - Generate CSS code for animations, gradients, shadows and more

📐

CSS Grid Generator - Grid 布局生成器

CSS Grid 布局生成器 - 可视化创建 CSS Grid 布局，一键复制代码

🗜️

CSS Minifier - Minify CSS Code Free

Free online CSS minifier - Minify and compress CSS code instantly

🎨

CSS to Tailwind Converter - Free Online Tool

Convert regular CSS to Tailwind CSS utility classes. Transform your stylesheets to Tailwind format instantly.

🔧

Caffeine Calculator - Free Online Tool

Free Caffeine Calculator - Track your daily caffeine intake from coffee, tea, energy drinks, and soda. See how caffeine affects your sleep and when it

🔥

Calorie Burn Calculator - Free Online Tool

Free Calorie Burn Calculator - Estimate calories burned for 100+ activities including running, walking, cycling, swimming, and strength training.

🔥

Calorie Calculator — Free Online Tool

Free Calorie Calculator — Calculate calorie quickly and accurately online.

🔧

Calorie Counter - Track Daily Calories Free

Free online calorie counter - Track daily calorie intake and manage your diet

🔥

Calorie Deficit Calculator — Free Online Tool

Free Calorie Deficit Calculator — Calculate calorie deficit quickly and accurately.

🔥

Calorie Deficit v10 Calculator — Free Online Tool

Free Calorie Deficit v10 Calculator — Calculate calorie deficit v10 quickly and accurately.

🔥

Calorie Deficit v4 Calculator — Free Online Tool

Free Calorie Deficit v4 Calculator — Calculate calorie deficit v4 quickly and accurately.

🔥

Calorie Deficit v5 Calculator — Free Online Tool

Free Calorie Deficit v5 Calculator — Calculate calorie deficit v5 quickly and accurately.

🔥

Calorie Deficit v6 Calculator — Free Online Tool

Free Calorie Deficit v6 Calculator — Calculate calorie deficit v6 quickly and accurately.

🔥

Calorie Deficit v7 Calculator — Free Online Tool

Free Calorie Deficit v7 Calculator — Calculate calorie deficit v7 quickly and accurately.

🔥

Calorie Deficit v8 Calculator — Free Online Tool

Free Calorie Deficit v8 Calculator — Calculate calorie deficit v8 quickly and accurately.

🔥

Calorie Deficit v9 Calculator — Free Online Tool

Free Calorie Deficit v9 Calculator — Calculate calorie deficit v9 quickly and accurately.

🔥

Calories Burned Calculator — Free Online Tool

Free Calories Burned Calculator — Calories Burned online tool.

📉

Car Depreciation Calculator - Free Online Tool

Calculate how much your car will depreciate over time.

🚗

Car Insurance Calculator 2026 - Auto Insurance Estimate

Free car insurance calculator to estimate your auto insurance premium. Calculate car insurance costs based on multiple factors.

🚗

Car Insurance Estimator

Free online Car Insurance Estimator

🔧

Car Lease Calculator - Free Online

Calculate monthly lease payments for a car. Compare leasing vs buying and understand lease terminology.

📋

Car Lease Calculator - Free Online Tool

Compare leasing vs buying and calculate lease payments.

🚗

Car Loan Calculator - Auto Payment & Interest Calculator

Free Car Loan Calculator - Calculate monthly car payments, total interest, and compare auto loan terms. Plan your vehicle purchase with trade-in and d

🔧

Car Maintenance Tracker - Free Online Tool

Track your vehicle maintenance schedule and service history.

🚗

Car Payment Calculator - Free Online Tool

Calculate your monthly car payment with interest, taxes, and fees.

💵

Car Value Estimator - Free Online Tool

Estimate your car's current market value based on condition and mileage.

🔧

Card Shuffler - Free Online Tool

Shuffle and deal cards from a standard 52-card deck. Deal hands for poker, blackjack, and more.

🗺️

Career Path Planner - Free Online Tool

Map your career progression with milestones, skills to develop, and timeline from current to dream role.

🏠

Carpet Calculator Calculator — Free Online Tool

Free Carpet Calculator Calculator — Calculate carpet calculator quickly and accurately.

🔧

Case Converter Calculator — Free Online Tool

Free Case Converter Calculator — Case Converter online tool.

🌡️

Celsius to Fahrenheit Calculator — Free Online Tool

Free Celsius to Fahrenheit Calculator — Calculate celsius to fahrenheit quickly and accurately.

🔤

Character Counter - 字符计数器

免费在线字符计数器 - 实时统计字数、字符数、句子数、段落数和阅读时间

🔤

Character Counter Calculator — Free Online Tool

Free Character Counter Calculator — Character Counter online tool.

📊

Chart Generator - Create Custom Charts Free

Free online chart generator - Create custom charts and graphs

🔧

Checklist Creator

Free online Checklist Creator

♟️

Chess Clock - Free Online Tool

Digital chess clock with multiple time controls — bullet, blitz, rapid, and custom. Supports increment.

📈

Child Growth Chart

Free online Child Growth Chart

🔒

Chmod Calculator - Free Online Tool

Calculate Linux file permissions in symbolic and numeric (octal) format. Convert between rwx notation and chmod numbers.

🎸

Chord Detector - AooPower

Identify chords.

📚

Citation Generator

Free online Citation Generator

💸

Closing Cost Calculator - Free Online Tool

Estimate closing costs when buying or selling a home.

📋

Closing Cost Estimator

Free online Closing Cost Estimator

🔍

Code Diff Tool - 代码对比

在线 Diff 工具 - 对比两段代码或文本的差异，高亮显示新增和删除内容

🗜️

Code Minifier - Minify JS, CSS, HTML Free

Free online code minifier - Minify JavaScript, CSS, and HTML code to reduce file size

🪙

Coin Flip - Flip a Coin Online Free

Free online coin flip simulator - Flip a coin online, customize heads and tails, track flip history

🪙

Coin Flip Calculator — Free Online Tool

Free Coin Flip Calculator — Coin Flip online tool.

🪙

Coin Flipper - Free Online Tool

Flip one or multiple coins with animated results. Track statistics and streaks over time.

🎓

College Savings Calculator 2026 - 529 Plan Calculator

Free college savings calculator to plan for education costs. Calculate 529 plan savings and college funding needs.

🎨

Color Contrast Checker - Check Accessibility Free

Free online color contrast checker - Check color contrast ratios for accessibility, WCAG AA and AAA compliance

🎨

Color Converter - Free Online Tool

Convert colors between HEX, RGB, HSL, and HSV formats. Preview colors and copy values instantly.

🎨

Color Converter Calculator — Free Online Tool

Free Color Converter Calculator — Color Converter online tool.

🎨

Color Grading LUT Guide - AooPower

Guide for color grading.

🎨

Color Picker - 颜色选择器

免费在线选择工具 - color picker - 可视化选择

🎲

Combination Calculator - AooPower

Calculate combinations.

🔧

Comet Tracker - Free Online Tool

Track notable comets and their visibility. Get information on upcoming comets and viewing tips.

💼

Commission Calculator — Free Online Tool

Free Commission Calculator — Calculate commission quickly and accurately.

🚗

Commute Time Estimator - Free Online Tool

Estimate daily commute time and annual costs by car, bus, or bike. Compare transportation options.

💰

Compound Interest Calculator — Free Online Tool

Free Compound Interest Calculator — Calculate compound interest quickly and accurately online.

🎚️

Compressor Calculator - AooPower

Calculate compression settings.

🔧

Concrete Calculator Calculator — Free Online Tool

Free Concrete Calculator Calculator — Calculate concrete calculator quickly and accurately.

🔧

Constellation Finder - Free Online Tool

Find which constellations are visible tonight based on your hemisphere and time of year.

🔧

Cookie Policy Generator

Free online Cookie Policy Generator

🔧

Cooking Timer - Free Online Tool

Free online cooking timer with multiple timers, presets for common foods, and audio alerts. Never overcook again!

🔧

Cooking Unit Converter - Free Online Tool

Free Cooking Unit Converter - Convert between cups, tablespoons, teaspoons, ounces, milliliters, liters, grams, and pounds. Essential kitchen measurem

🔧

Countdown Calculator — Free Online Tool

Free Countdown Calculator — Countdown online tool.

🔧

Countdown Timer

Free Online Countdown Timer - Set a countdown to any date and time. Perfect for events, deadlines, product launches, holidays, and milestones. See day

⏰

Countdown Timer with Alarm - Free Online Timer

Free online countdown timer with alarm - Set custom countdown timer with sound alarm, multiple presets available

🔧

Cover Letter Generator

Free online Cover Letter Generator

💳

Credit Card Interest Calculator - APR Interest Cost

Free Credit Card Interest Calculator - Calculate how much interest you're paying on credit card balances. See daily, monthly, and annual interest char

💳

Credit Card Payoff Calculator - Debt Payoff Plan

Free Credit Card Payoff Calculator - Create a debt payoff plan. See how long to pay off credit card debt, total interest, and compare payoff strategie

🎁

Credit Card Rewards Calculator - Maximize Your Cashback &...

Free Credit Card Rewards Calculator - Calculate the real value of your credit card rewards, cashback, points, and miles. Compare card rewards and find

💳

Credit Score Calculator — Free Online Tool

Free Credit Score Calculator - Estimate your credit score based on payment history, credit utilization, and other factors.

⏰

Cron Expression Generator - Create Cron Jobs Free

Free online cron expression generator - Create cron expressions for scheduling tasks

⏰

Cron Expression Generator - Create Cron Jobs Free

Free online cron expression generator - Create cron expressions visually for scheduling tasks

⏰

Crontab Expression Validator - Free Online Tool

Validate and explain cron expressions. See when your cron job will run next with human-readable descriptions of cron schedules.

⏰

Crontab Generator - Cron 表达式生成

免费在线 Crontab 生成器 - 可视化创建 Cron 定时任务表达式，支持常用预设

🔧

Crypto Profit Calculator - Calculate Crypto Trading Profits

Free online crypto profit calculator - Calculate cryptocurrency trading profits and losses

🎯

Cta Generator

Free online Cta Generator

🧮

Cubic Equation Solver - AooPower

Solve cubic equations.

💱

Currency Converter - Free Online

Convert between major world currencies with approximate exchange rates. Quick reference for USD, EUR, GBP, JPY and more.

💱

Currency Exchange Calculator - Free Online Tool

Free currency exchange calculator with 30+ currencies. Convert USD, EUR, GBP, JPY, CNY, and more with live-updated reference rates.

💱

Currency Exchange Live

Free online Currency Exchange Live

🔧

Cycling Calories Calculator

Calculate calories burned cycling based on speed, duration, weight, and terrain. Compare different cycling intensities and plan your rides.

🔧

Cycling Speed Calculator — Free Online Tool

Free Cycling Speed Calculator — Calculate cycling speed quickly and accurately.

🔧

DNS Lookup - DNS 查询

网站 DNS 查询工具 - 查询域名 DNS 记录，包括 A、AAAA、MX、CNAME、TXT 等记录类型

📅

Daily Planner

Free online Daily Planner

💾

Data Transfer Calculator — Free Online Tool

Free Data Transfer Calculator — Calculate data transfer quickly and accurately.

📊

Data URI Generator - Convert Images to Base64 Free

Free online Data URI generator - Convert images to Base64 Data URI for embedding in HTML and CSS

📅

Date Calculator — Free Online Tool

Free Date Calculator — Calculate the number of days between two dates or add/subtract days from a date.

📅

Date Difference Calculator — Free Online Tool

Free Date Difference Calculator — Calculate date difference quickly and accurately.

💳

Debt Payoff Calculator — Free Online Tool

Free Debt Payoff Calculator — Debt Payoff online tool.

🔧

Debt Snowball Calculator - Free Online Tool

Free Debt Snowball Calculator - Compare snowball vs avalanche debt payoff strategies. See your debt-free date and total interest saved.

📊

Debt-to-Income Ratio Calculator 2026 - DTI Calculator

Free debt-to-income ratio calculator to assess your financial health. Calculate DTI for loan applications.

🔊

Decibel Calculator - AooPower

Calculate decibel levels.

⏱️

Delay Time Calculator - AooPower

Calculate delay times.

⚖️

Density Calculator - AooPower

Calculate density.

🎯

Depth of Field Calculator - AooPower

Calculate depth of field.

📐

Diagram Maker - Create Custom Diagrams Free

Free online diagram maker - Create custom diagrams and flowcharts

🎲

Dice Roller - Roll Dice Online Free

Free online dice roller - Roll 1 to 10 dice, customize dice types (D4, D6, D8, D10, D12, D20), track roll history

🎯

Dice Roller Calculator — Free Online Tool

Free Dice Roller Calculator — Dice Roller online tool.

🔍

Diff Checker - Compare Text & Code

Free online diff checker - Compare two text files or code, highlight differences instantly

🔬

Diffraction Limit Calculator - AooPower

Calculate diffraction limit.

💧

Dilution Calculator - AooPower

Calculate dilutions.

🛡️

Disability Insurance Calculator - Free Online Tool

Calculate disability insurance needs and coverage amounts.

🎒

Disaster Prep Checklist - Free Online Tool

Create a personalized disaster preparedness checklist for your area.

🔧

Disclaimer Generator

Free online Disclaimer Generator

🏷️

Discount Calculator Calculator — Free Online Tool

Free Discount Calculator Calculator — Calculate discount calculator quickly and accurately.

🏷️

Discount Calculator — Free Online Tool

Free Discount Calculator — Calculate sale prices, savings, and final cost after percentage discounts.

🎯

Down Payment Calculator - Free Online Tool

Calculate how much you need for a down payment on a home.

🔧

Download Time Calculator — Free Online Tool

Free Download Time Calculator — Calculate download time quickly and accurately.

🔧

Dropshipping Calculator

Free online Dropshipping Calculator

📅

Due Date Calculator - Free Online

Calculate days between dates, add or subtract days from a date, and find future or past dates.

🤰

Due Date Tracker

Free online Due Date Tracker

💳

EMI Calculator - Free Online

Calculate Equated Monthly Installment (EMI) for any loan. See total interest and amortization schedule.

📈

EQ Frequency Chart - AooPower

Visualize EQ frequencies.

🔧

Eclipse Calendar - Free Online Tool

View upcoming solar and lunar eclipses worldwide with dates, types, and visibility regions.

📊

Eisenhower Matrix

Free online Eisenhower Matrix

🔌

Electric vs Gas Calculator - Free Online Tool

Compare the total cost of ownership between electric and gas vehicles.

🔧

Electricity Cost Calculator - Free Online Tool

Calculate electricity costs for appliances, estimate monthly bills, and find ways to save on your energy costs.

🔬

Element Calculator

Free online Element Calculator

🔧

Elevator Pitch Builder - Free Online Tool

Build a compelling 30-second elevator pitch for networking, interviews, or business meetings.

✉️

Email Signature Generator

Free online Email Signature Generator

✉️

Email Subject Line Tester

Free Email Subject Line Tester - Score your email subject lines for effectiveness. Get actionable tips to improve open rates based on length, power wo

📧

Email Subject Tester

Free online Email Subject Tester

✉️

Email Template Builder - Free Online Tool

Generate professional email templates for common scenarios — follow-ups, introductions, cold outreach, and more.

📧

Email Validator - Check Email Format Free

Free online email validator - Check if email addresses are valid and properly formatted

💰

Emergency Budget Calculator - Free Online Tool

Create a bare-bones budget for emergency financial situations.

📞

Emergency Contact Generator - Free Online Tool

Generate and organize your emergency contact list with ICE information.

🔧

Emergency Fund Calculator - Free Online Tool

Calculate how much you need in your emergency fund based on expenses and risk tolerance.

💧

Emergency Water Calculator - Free Online Tool

Calculate how much water you need for emergency preparedness.

🔧

Emoji Picker - Emoji 搜索

Emoji 搜索工具 - 快速搜索和复制 Emoji 表情符号

🔧

Emoji Picker - Emoji 搜索复制

免费在线 Emoji 搜索复制工具 - 快速查找和复制所有 Emoji 表情符号

🔧

Energy Equation

Free online Energy Equation

🔧

Energy Mass Calculator - AooPower

Calculate E=mc².

🧶

Etsy Fee Calculator

Free online Etsy Fee Calculator

🗺️

Evacuation Route Planner - Free Online Tool

Plan your emergency evacuation routes and meeting points.

📷

Exif Reader

Free online Exif Reader

🧾

Expense Split Calculator — Free Online Tool

Free Expense Split Calculator — Calculate expense split quickly and accurately.

💸

Expense Tracker — Free Online Tool

Free Expense Tracker - Track your daily expenses, categorize spending, and understand where your money goes.

📅

Expiration Date Calculator - Calculate Product Expiry Free

Free online expiration date calculator - Calculate product expiration dates, shelf life, and days until expiry

📊

Exposure Value Calculator - AooPower

Calculate exposure value (EV).

📱

Facebook Ad Preview

Free online Facebook Ad Preview

🔧

Factorial Calculator - AooPower

Calculate factorials.

🔖

Favicon Generator - Favicon 生成器

Favicon 图标生成器 - 上传图片自动生成各种尺寸的 Favicon 图标

🔧

Fibonacci Generator - AooPower

Generate Fibonacci sequence.

📂

File Extension Info

Free online File Extension Info

🔐

File Hash Checker

Free online File Hash Checker

📁

File Size Converter

Free online File Size Converter

📝

Final Grade Calculator — Free Online Tool

Free Final Grade Calculator — Calculate what score you need on your final exam to achieve your target grade.

🩹

First Aid Guide - Free Online Tool

Quick reference first aid guide for common emergencies.

🔧

Flight Time Calculator

Free online Flight Time Calculator

🔧

Flowchart Creator - Create Custom Flowcharts Free

Free online flowchart creator - Create custom flowcharts and process diagrams

📐

Focal Length Crop Calculator - AooPower

Convert focal lengths between sensors.

🎯

Focus Mode

Free online Focus Mode

🔤

Font Size Calculator — Free Online Tool

Free Font Size Calculator — Font Size online tool.

🔧

Force Calculator

Free online Force Calculator

💱

Forex Calculator - Calculate Forex Trading Profits Free

Free online forex calculator - Calculate forex trading profits, losses, and pip values

📐

Fraction Calculator - Add, Subtract, Multiply, Divide Fra...

Free online fraction calculator - Add, subtract, multiply, and divide fractions with step-by-step solutions

➗

Fraction Simplifier - AooPower

Simplify fractions.

🔢

Fraction to Decimal Calculator — Free Online Tool

Free Fraction to Decimal Calculator — Calculate fraction to decimal quickly and accurately.

🎬

Frame Rate Converter - AooPower

Convert frame rates.

⛽

Fuel Cost Calculator - Free Online

Calculate fuel costs for any trip. Compare gas prices, estimate MPG savings, and plan road trip budgets.

⛽

Fuel Cost v10 Calculator — Free Online Tool

Free Fuel Cost v10 Calculator — Calculate fuel cost v10 quickly and accurately.

⛽

Fuel Cost v4 Calculator — Free Online Tool

Free Fuel Cost v4 Calculator — Calculate fuel cost v4 quickly and accurately.

⛽

Fuel Cost v5 Calculator — Free Online Tool

Free Fuel Cost v5 Calculator — Calculate fuel cost v5 quickly and accurately.

⛽

Fuel Cost v6 Calculator — Free Online Tool

Free Fuel Cost v6 Calculator — Calculate fuel cost v6 quickly and accurately.

⛽

Fuel Cost v7 Calculator — Free Online Tool

Free Fuel Cost v7 Calculator — Calculate fuel cost v7 quickly and accurately.

⛽

Fuel Cost v8 Calculator — Free Online Tool

Free Fuel Cost v8 Calculator — Calculate fuel cost v8 quickly and accurately.

⛽

Fuel Cost v9 Calculator — Free Online Tool

Free Fuel Cost v9 Calculator — Calculate fuel cost v9 quickly and accurately.

📊

GCD LCM Calculator - AooPower

Calculate GCD and LCM.

🔢

GCD LCM Calculator - Calculate GCD & LCM Free

Free online GCD LCM calculator - Calculate Greatest Common Divisor and Least Common Multiple

🎬

GIF Maker - Free Online Tool

Create animated GIFs from multiple images. Upload frames, set delay, and generate GIFs right in your browser.

📚

GPA Calculator Calculator — Free Online Tool

Free GPA Calculator Calculator — Calculate gpa calculator quickly and accurately.

📚

GPA Calculator — Free Online Tool

Free GPA Calculator - Calculate your Grade Point Average easily. Supports semester and cumulative GPA.

🖥️

GPU Encoding Calculator - AooPower

Calculate GPU encoding.

⛽

Gas Cost Calculator - Free Online Tool

Calculate gas costs for trips and compare fuel efficiency.

🎯

Goal Tracker

Free online Goal Tracker

🔧

Golden Hour Calculator - AooPower

Calculate golden hour times.

📚

Grade Calculator - Calculate GPA & Final Grades Free

Free online grade calculator - Calculate GPA, final grades, and test scores

📝

Grade Percentage Calculator 2026 - Test Grade Calculator

Free grade percentage calculator to calculate test scores and letter grades. Calculate your grade percentage easily.

🔧

Gradient Generator - 渐变生成器

免费在线生成器 - gradient generator - 一键生成，简单好用

✏️

Grammar Checker - Free Online Tool

Free online grammar checker that catches common writing errors. Check for spelling mistakes, punctuation errors, and grammar issues instantly.

🔧

Gratitude Journal - Free Online Tool

Write daily gratitude entries. Build a positive mindset by recording things you're thankful for each day.

📸

HDR Merge Guide - AooPower

Guide for HDR merging.

📸

HEIC to JPG Converter — Free Online Tool

Free HEIC to JPG Converter - Convert iPhone HEIC/HEIF photos to JPG format instantly in your browser. No upload required, 100% private.

🔐

HTML Entity Encoder - HTML 实体编码

HTML 实体编码/解码工具 - 在线转换 HTML 特殊字符，防止 XSS 攻击

🗜️

HTML Minifier - HTML 压缩器

免费在线压缩工具 - html minifier - 代码压缩美化

📊

HTML Table Generator - 表格生成器

HTML 表格生成器 - 可视化创建 HTML 表格，支持自定义行列数、样式和内容

📝

HTML to Markdown Converter — Free Online Tool

Free HTML to Markdown Converter - Convert HTML code to clean Markdown format instantly. Preserves headings, links, lists, images, and formatting.

📡

HTTP Status Code Checker - HTTP 状态码查询

免费在线 HTTP 状态码查询工具 - 查看所有 HTTP 状态码含义、用途和示例

🔧

Half Life Calculator - AooPower

Calculate half-life decay.

🔐

Hash Generator - 哈希生成器

免费在线生成器 - hash generator - 一键生成，简单好用

🔧

Hashtag Generator

Free online Hashtag Generator

📝

Heading Checker - 标题检查工具

免费在线检查工具 - heading checker - 快速检测分析

📰

Headline Analyzer

Free online Headline Analyzer

🔧

Health Insurance Calculator - Free Online Tool

Compare health insurance plans and estimate costs.

❤️

Heart Rate Calculator — Free Online Tool

Free Heart Rate Calculator — Heart Rate online tool.

🔥

Heat Capacity Calculator - AooPower

Calculate heat capacity.

🔧

Hex Converter - Convert Hexadecimal Free

Free online hexadecimal converter - Convert hex to decimal, binary, and octal

💰

Home Affordability Calculator - Free Online Tool

Calculate how much house you can afford based on your income.

🔧

Home Energy Audit - Free Online Tool

Audit your home's energy usage. Identify savings opportunities on heating, cooling, lighting, and appliances.

📈

Home Equity Calculator - Free Online Tool

Calculate your home equity and potential HELOC amount.

🔨

Home Improvement ROI Calculator - Free Online Tool

Calculate return on investment for home improvement projects.

🏠

Home Insurance Calculator - Free Online Tool

Estimate home insurance costs based on property value and location.

🏠

Home Insurance Estimator

Free online Home Insurance Estimator

🔧

Home Maintenance Schedule - Free Online Tool

Never miss home maintenance tasks. Get seasonal reminders for HVAC, gutters, plumbing, and more.

🔧

Home Value Estimator - Free Online Tool

Estimate your home's market value based on square footage, bedrooms, location, and comparable sales.

⏱️

Hourly Rate Calculator — Free Online Tool

Free Hourly Rate Calculator — Calculate hourly rate quickly and accurately.

⏰

Hourly to Salary Calculator - Free Online

Convert hourly wage to annual salary and vice versa. Factor in overtime, benefits, and taxes.

⏱️

Hours Between Times Calculator — Free Online Tool

Free Hours Between Times Calculator — Calculate hours between times quickly and accurately.

🔧

House Affordability

Free online House Affordability

🔧

Hyperfocal Distance Calculator - AooPower

Calculate hyperfocal distance.

🔧

IP Address Lookup - Find IP Location Free

Free online IP address lookup - Find IP location, ISP, and network information

🔧

IP Address Tools - Find Your IP & Location Free

Free online IP address tools - Find your public IP, lookup IP location, and get network information

🔧

IP Subnet Calculator - Free Online Tool

Calculate IP subnets, CIDR notation, network addresses, broadcast addresses, and available host ranges for IPv4 networks.

💰

IRA Contribution Calculator - Free Online Tool

Calculate optimal IRA contributions and growth.

🔧

ISO Calculator - AooPower

Calculate optimal ISO settings.

🔧

Ideal Gas Law Calculator - AooPower

Calculate gas properties.

⚖️

Ideal Weight Calculator — Free Online Tool

Free Ideal Weight Calculator — Ideal Weight online tool.

🎨

Image Color Extractor - Free Online Tool

Extract dominant colors from any image. Get a color palette with HEX, RGB values and copy with one click.

🖼️

Image Compressor - 图片压缩

免费在线压缩工具 - image compressor - 智能压缩，保持质量

🖼️

Image Converter - Convert Images Between Formats Free

Free online image converter - Convert images between JPG, PNG, WEBP, GIF, BMP formats instantly

✂️

Image Cropper - Free Online Tool

Crop images online for free. Select a region, choose preset aspect ratios, and download the cropped result instantly.

🔧

Image Filter - Free Online Tool

Apply filters to images online. Grayscale, sepia, blur, brightness, contrast, saturation, and more — all processed locally.

🖼️

Image Metadata Viewer

Free online Image Metadata Viewer

📐

Image Resizer - Free Online Tool

Resize images online for free. Change image dimensions, maintain aspect ratio, and download in PNG or JPEG format.

🔄

Image Rotate - Free Online Tool

Rotate and flip images online. Rotate by 90, 180, 270 degrees or any custom angle. Flip horizontally or vertically.

💧

Image Watermark - Free Online Tool

Add text watermarks to images online. Customize font, size, color, opacity, and position to protect your images.

🖼️

Image to Base64 - 图片转 Base64

免费在线 Base64 图片编码工具 - 将图片转为 Base64 编码，支持 Data URI 格式

🔍

Image to Text (OCR) - Free Online Tool

Free online image to text OCR tool - Extract text from images using browser-based OCR, supports multiple languages

🖼️

Image to WebP Converter

免费在线图片工具 - image to webp - 图片处理编辑

📉

Inflation Calculator - Free Online Tool

Calculate the impact of inflation on purchasing power. See how much your money was worth in the past or will be worth in the future.

📈

Inflation Rate Calculator - Free Online Tool

Calculate how inflation affects purchasing power over time. See how much money you need in the future to match today's buying power.

📊

Infographic Maker - Create Custom Infographics Free

Free online infographic maker - Create custom infographics easily

📸

Instagram Bio Generator

Free online Instagram Bio Generator

📸

Instagram Hashtag Generator - Get Trending Hashtags Free

Free online Instagram hashtag generator - Generate trending hashtags for Instagram posts to increase engagement

🔧

Internet Speed Test - Test Your Connection Speed Free

Free online internet speed test - Test your download and upload speed, ping, and connection quality instantly

🎤

Interview Question Generator - Free Online Tool

Generate practice interview questions by role and type — behavioral, technical, situational, and brain teasers.

💰

Investment Calculator - Free Online Tool

Free investment return calculator. Calculate compound interest, ROI, and projected growth for stocks, bonds, mutual funds, and other investments.

📈

Investment Return Calculator - Free Online Tool

Free Investment Return Calculator - Calculate ROI, compound growth, and total returns for stocks, bonds, and other investments with inflation adjustme

📄

Invoice Generator - Create Professional Invoices Free

Free Online Invoice Generator - Create professional invoices instantly. Add line items, taxes, discounts, and download as PDF. No registration require

📋

JSON Formatter - JSON 格式化

免费在线格式化工具 - json formatter - 代码美化、压缩、验证

🔍

JSON Path Finder - JSON 路径查询

JSON Path 查询工具 - 使用 JSONPath 表达式查询和提取 JSON 数据

📋

JSON Validator - Validate & Format JSON Free

Free online JSON validator - Validate and format JSON data instantly

📊

JSON to Excel - JSON 转 Excel

JSON 转 Excel/CSV 工具 - 将 JSON 数据转换为 Excel 或 CSV 格式，支持下载

🔄

JSON to XML Converter — Free Online Tool

Free JSON to XML Converter - Convert JSON data to XML format instantly. Supports nested objects, arrays, and custom root element names.

🔐

JWT Decoder - Free Online Tool

Decode and inspect JSON Web Tokens (JWT). View header, payload, and signature without any server-side processing.

🗜️

JavaScript Minifier - Minify JS Code Free

Free online JavaScript minifier - Minify and compress JavaScript code instantly

😴

Jet Lag Calculator

Free online Jet Lag Calculator

📝

Job Description Generator

Free online Job Description Generator

📋

Kanban Board

Free online Kanban Board

🔑

Keyword Density Checker - 关键词密度检查

免费在线工具 - keyword density - 简单好用，无需注册

⚖️

Kg to Pounds Calculator — Free Online Tool

Free Kg to Pounds Calculator — Calculate kg to pounds quickly and accurately.

🔌

Kirchhoff's Law Calculator - AooPower

Solve circuit problems.

📏

Km to Miles Calculator — Free Online Tool

Free Km to Miles Calculator — Calculate km to miles quickly and accurately.

📐

Land Area Calculator - Free Online Tool

Free Land Area Calculator - Calculate the area of any land plot in acres, square feet, hectares, and more. Supports rectangular, triangular, circular,

🏆

Landing Page Grader

Free online Landing Page Grader

🔧

Lease vs Buy Calculator

Compare the total cost of leasing versus buying a car over time. See which option saves you more money based on your driving habits and financial situ

🔍

Lens Recommendation Tool - AooPower

Get lens recommendations.

📄

Letterhead Creator

Free online Letterhead Creator

❤️

Life Insurance Calculator - Free Online Tool

Calculate how much life insurance coverage you need.

🛡️

Life Insurance Estimator

Free online Life Insurance Estimator

🎨

Light Painting Timer - AooPower

Timer for light painting.

🔧

Light Pollution Guide - Free Online Tool

Understand light pollution levels with the Bortle Scale. Tips for finding dark skies near you.

🔧

Limiter Calculator - AooPower

Calculate limiter thresholds.

💼

Linkedin Post Formatter

Free online Linkedin Post Formatter

💼

Linkedin Summary Generator

Free online Linkedin Summary Generator

🔧

Liters to Gallons Calculator — Free Online Tool

Free Liters to Gallons Calculator — Calculate liters to gallons quickly and accurately.

💰

Loan Calculator - Calculate Monthly Payments Free

Free online loan calculator - Calculate monthly payments, total interest, and amortization schedule for personal loans, mortgages, and car loans

📊

Loan Comparison Calculator - Compare Loan Options Free

Free online loan comparison calculator - Compare different loan options and rates

💰

Loan Interest Calculator — Free Online Tool

Free Loan Interest Calculator — Calculate loan interest quickly and accurately.

💰

Loan Interest v10 Calculator — Free Online Tool

Free Loan Interest v10 Calculator — Calculate loan interest v10 quickly and accurately.

💰

Loan Interest v4 Calculator — Free Online Tool

Free Loan Interest v4 Calculator — Calculate loan interest v4 quickly and accurately.

💰

Loan Interest v5 Calculator — Free Online Tool

Free Loan Interest v5 Calculator — Calculate loan interest v5 quickly and accurately.

💰

Loan Interest v6 Calculator — Free Online Tool

Free Loan Interest v6 Calculator — Calculate loan interest v6 quickly and accurately.

💰

Loan Interest v7 Calculator — Free Online Tool

Free Loan Interest v7 Calculator — Calculate loan interest v7 quickly and accurately.

💰

Loan Interest v8 Calculator — Free Online Tool

Free Loan Interest v8 Calculator — Calculate loan interest v8 quickly and accurately.

💰

Loan Interest v9 Calculator — Free Online Tool

Free Loan Interest v9 Calculator — Calculate loan interest v9 quickly and accurately.

💰

Loan Payment Calculator - Calculate Monthly Payments Free

Free online loan payment calculator - Calculate monthly loan payments, interest, and amortization

🎨

Logo Generator - Create Custom Logos Free

Free online logo generator - Create custom logos for your brand

👴

Long-Term Care Calculator - Free Online Tool

Estimate long-term care insurance needs and costs.

📜

Lorem Ipsum Generator - Generate Placeholder Text Free

Free online Lorem Ipsum generator - Generate placeholder text for your designs and mockups

🔈

Loudness Calculator - AooPower

Calculate loudness (LUFS).

❤️

Love Calculator

Fun love compatibility calculator! Enter two names and discover your love compatibility percentage. Just for fun — share with friends and have a laugh

🎹

MIDI Tempo Calculator - AooPower

Calculate MIDI tempo.

📋

MIME Type Checker - Identify File Types Free

Free online MIME type checker - Identify file MIME types and get correct content-type

📊

MPG Calculator - Free Online Tool

Calculate your vehicle's miles per gallon and fuel efficiency.

🔧

Macro Calculator — Free Online Tool

Free Macro Calculator — Calculate your daily protein, carbs, and fat targets for weight loss, maintenance, or muscle gain.

📊

Margin vs Markup Calculator - Convert & Compare

Free Margin vs Markup Calculator - Convert between margin and markup percentages instantly. Understand the difference and calculate selling prices fro

📝

Markdown Editor - Markdown 编辑器

免费在线编辑器 - markdown editor - 实时编辑预览

📄

Markdown to PDF - Markdown 转 PDF

在线 Markdown 转 PDF 工具 - 将 Markdown 文档转换为精美 PDF，支持自定义样式

🏷️

Markup Calculator

Free online Markup Calculator

🔢

Matrix Calculator

Perform matrix operations: addition, subtraction, multiplication, transpose, determinant, and inverse. Supports 2x2, 3x3, and 4x4 matrices.

📊

Matrix Operations Calculator - AooPower

Perform matrix calculations.

❤️

Max Heart Rate Calculator — Free Online Tool

Free Max Heart Rate Calculator — Calculate max heart rate quickly and accurately.

📈

Median Calculator - AooPower

Calculate median.

🔧

Medical Info Card Generator - Free Online Tool

Generate printable medical information cards for emergencies.

🔧

Medicare Calculator - Free Online Tool

Estimate Medicare costs and coverage options for retirement.

🔧

Meditation Timer - Free Online Tool

Set custom meditation sessions with bells, ambient sounds, and guided intervals. Track your daily mindfulness practice.

📋

Meeting Agenda Template

Free online Meeting Agenda Template

💵

Meeting Cost Calculator - Free Online Tool

Calculate the true cost of meetings based on attendees, duration, and average salaries. See if it's worth it.

🖼️

Megapixel Print Size Calculator - AooPower

Calculate max print size.

🏷️

Meta Tag Generator - Meta 标签生成器

${desc}

📐

Meters to Feet Calculator — Free Online Tool

Free Meters to Feet Calculator — Calculate meters to feet quickly and accurately.

📋

Mime Type Lookup

Free online Mime Type Lookup

🔧

Mind Map Maker

Free online Mind Map Maker

🔔

Mindfulness Bell - Free Online Tool

Set periodic mindfulness bells throughout your day. Pause, breathe, and return to the present moment.

🔧

Minimum Payment Calculator - True Cost of Credit Card Min...

Free Minimum Payment Calculator - See the true cost of paying only minimum payments on credit cards. Calculate total interest and time to pay off.

📄

Mla Formatter

Free online Mla Formatter

📊

Mode Calculator - AooPower

Find mode.

⚗️

Molarity Calculator - AooPower

Calculate molarity.

⚗️

Molecule Weight

Free online Molecule Weight

🔧

Mood Tracker - Free Online Tool

Log and visualize your daily mood patterns. Track emotions over time to identify trends and triggers.

🔧

Moon Phase Calculator - AooPower

Calculate moon phase.

🔧

Moon Rise & Set - Free Online Tool

Calculate moonrise, moonset times and current moon phase for any date and location.

🏠

Mortgage Affordability Calculator - Calculate How Much Ho...

Free online mortgage affordability calculator - Calculate how much house you can afford

🏠

Mortgage Calculator - Free Online Tool

Calculate your monthly mortgage payment with taxes and insurance.

🔄

Mortgage Refinance Calculator - Should You Refinance?

Free Mortgage Refinance Calculator - See if refinancing your mortgage saves money. Compare current vs new loan, calculate break-even point and lifetim

📦

Moving Box Calculator Calculator — Free Online Tool

Free Moving Box Calculator Calculator — Calculate moving box calculator quickly and accurately.

📦

Moving Checklist - Free Online Tool

Interactive moving checklist with timeline. Track tasks from 8 weeks before to moving day and beyond.

🔧

Muscle Group Guide

Free online Muscle Group Guide

🔧

Nature Sounds Player - Free Online Tool

Mix and match nature sounds — rain, ocean, birds, thunder, wind — for the perfect ambient soundscape.

🔧

Nda Generator

Free online Nda Generator

📍

Neighborhood Score - Free Online Tool

Rate a neighborhood on safety, walkability, schools, amenities, and transit. Get an overall livability score.

💵

Net Salary Calculator — Free Online Tool

Free Net Salary Calculator — Calculate net salary quickly and accurately.

💰

Net Worth Calculator - Calculate Your Net Worth Free

Free online net worth calculator - Calculate your total net worth and track wealth growth

💼

Networking Card Maker - Free Online Tool

Create a digital networking card with your contact info, social links, and QR code for easy sharing.

📝

Notes App

Free online Notes App

🔢

Number Base Converter - 进制转换器

免费在线二进制/十进制/十六进制转换器 - 支持二进制、八进制、十进制、十六进制互转

🔢

Number to Words - Convert Numbers to Words Free

Free online number to words converter - Convert numbers to English words

🔢

Octal Converter - Convert Octal Free

Free online octal converter - Convert octal to decimal, binary, and hexadecimal

🔧

Ohm's Law Calculator - AooPower

Calculate V, I, R.

🔧

One Rep Max Calculator — Free Online Tool

Free One Rep Max Calculator — One Rep Max online tool.

🏋️

One Rep Max Estimator

Free online One Rep Max Estimator

⏱️

Online Stopwatch - Free Online Tool

Free Online Stopwatch - Precise digital stopwatch with lap times, split tracking, and time logging. Perfect for sports timing, cooking, studying, and

🔧

Open Graph Preview - OG 预览

免费在线工具 - og preview - 简单好用，无需注册

📊

Options Profit Calculator - Calculate Options Trading Pro...

Free online options profit calculator - Calculate options trading profits and losses

⏰

Overtime Pay Calculator 2026 - OT Pay Calculator

Free overtime pay calculator to calculate your overtime earnings. Calculate time-and-a-half and double-time pay.

🔧

Ovulation Calculator - Calculate Ovulation Date Free

Free online ovulation calculator - Calculate ovulation date and fertile window

📅

Ovulation Calculator Calculator — Free Online Tool

Free Ovulation Calculator Calculator — Ovulation Calculator online tool.

📄

PDF Generator - Free Online Tool

Generate PDF documents from text right in your browser. Add headings, paragraphs, and format your content into downloadable PDFs.

📄

PDF Merge & Split - Combine and Split PDFs Free

Free online PDF merge and split tool - Combine or split PDF files instantly

🔧

PDF Sign - Add Digital Signature to PDF Free

Free online PDF signer - Add digital signatures to PDF documents

📄

PDF to Word Converter - Free Online Tool

Free online PDF to Word converter - Convert PDF files to editable Word documents instantly, no signup required

🏃

Pace Calculator

Free online Pace Calculator

🏃

Pace Calculator Calculator — Free Online Tool

Free Pace Calculator Calculator — Pace Calculator online tool.

🔧

Page Speed Checker - 网页速度检测

网页性能检测工具 - 分析网页加载速度、资源大小、性能评分和优化建议

🎨

Paint Calculator

Free Paint Calculator - Calculate exactly how much paint you need for any room. Enter room dimensions, number of doors and windows, and get precise ga

🎨

Paint Calculator Calculator — Free Online Tool

Free Paint Calculator Calculator — Calculate paint calculator quickly and accurately.

🖼️

Panorama Stitch Guide - AooPower

Guide for panorama stitching.

🔐

Password Generator - 密码生成器

免费在线生成器 - password generator - 一键生成，简单好用

🔐

Password Length Calculator — Free Online Tool

Free Password Length Calculator — Password Length online tool.

🔐

Password Strength Tester - Check Password Security Free

Free online password strength tester - Check password security and get improvement suggestions

💼

Payroll Calculator - Employee Take-Home Pay Calculator

Free Payroll Calculator - Calculate employee take-home pay, federal and state tax withholdings, FICA, Social Security, and Medicare deductions for 202

📄

Pdf Page Counter

Free online Pdf Page Counter

📊

Peak to Average Calculator - AooPower

Calculate peak/average ratio.

📊

Pension Calculator - Free Online Tool

Calculate your pension benefits from employer plans.

📊

Percentage Calculator - AooPower

Calculate percentages.

📊

Percentage Calculator — Free Online Tool

Free Percentage Calculator — Calculate percentage quickly and accurately online.

📅

Period Calculator - Track Menstrual Cycle Free

Free online period calculator - Track menstrual cycle and predict ovulation

⚗️

Periodic Table Lookup

Free online Periodic Table Lookup

🔢

Permutation Calculator - AooPower

Calculate permutations.

💰

Personal Loan Calculator 2026 - Monthly Payment Calculator

Free personal loan calculator to estimate monthly payments. Calculate personal loan with interest rates, fees, and terms.

🔧

Pet Insurance Calculator - Free Online Tool

Calculate pet insurance costs and coverage options.

📌

Pinterest Pin Sizer

Free online Pinterest Pin Sizer

🔧

Pitch Detector - AooPower

Detect musical pitch.

🖼️

Pixel Converter Calculator — Free Online Tool

Free Pixel Converter Calculator — Pixel Converter online tool.

🖼️

Placeholder Image Generator

免费在线工具 - placeholder image - 简单好用，无需注册

🔍

Plagiarism Checker - Free Online Tool

Compare two texts for similarity. Detect copied content with our free text comparison tool that highlights matching phrases and calculates similarity

🔍

Plagiarism Score

Free online Plagiarism Score

🔧

Planet Position Calculator - Free Online Tool

Calculate current positions of planets in the sky. See which planets are visible tonight.

🔧

Pomodoro Timer - Free Online Tool

Free Pomodoro timer for productivity. Work in focused 25-minute intervals with short and long breaks to maximize efficiency.

🔧

Power Outage Tracker - Free Online Tool

Track and manage your home during power outages.

🤰

Pregnancy Calculator - Calculate Due Date Free

Free online pregnancy calculator - Calculate due date and track pregnancy progress

🤰

Pregnancy Due Date Calculator — Free Online Tool

Free Pregnancy Due Date Calculator — Pregnancy Due Date online tool.

🤰

Pregnancy Weight Gain Calculator - Healthy Gain by Trimester

Free Pregnancy Weight Gain Calculator - Track healthy weight gain during pregnancy based on pre-pregnancy BMI. Get trimester-by-trimester guidelines p

💲

Pricing Strategy

Free online Pricing Strategy

🔧

Prime Factorization Calculator - Find Prime Factors Free

Free online prime factorization calculator - Find prime factors of any number

🔍

Prime Factorization Tool - AooPower

Find prime factors.

🔒

Privacy Policy Generator

Free online Privacy Policy Generator

🎲

Probability Calculator - AooPower

Calculate probability.

📈

Productivity Score - Free Online Tool

Rate your daily productivity across focus, time management, energy, and output. Track trends over time.

💰

Profit Margin Calculator - Free Margin & Markup Calculator

Free Profit Margin Calculator - Calculate gross, operating, and net profit margins. Analyze markup, revenue, cost, and profitability for your business

💰

Profit Margin Tool

Free online Profit Margin Tool

📊

Project Timeline

Free online Project Timeline

🔧

Property Comparison - Free Online Tool

Compare multiple properties side by side. Evaluate price, size, location score, and monthly costs.

📋

Property Tax Calculator - Free Online Tool

Estimate property taxes based on home value and location.

💰

Property Tax Estimator

Free online Property Tax Estimator

🔧

Property Value Estimator

Free online Property Value Estimator

⚖️

Proportion Solver - AooPower

Solve proportions.

🥩

Protein Intake Calculator - How Much Protein Do You Need?

Free Protein Intake Calculator - Calculate your daily protein needs based on body weight, activity level, and fitness goals. Get meal-by-meal protein

🥩

Protein Intake v10 Calculator — Free Online Tool

Free Protein Intake v10 Calculator — Calculate protein intake v10 quickly and accurately.

🥩

Protein Intake v4 Calculator — Free Online Tool

Free Protein Intake v4 Calculator — Calculate protein intake v4 quickly and accurately.

🥩

Protein Intake v5 Calculator — Free Online Tool

Free Protein Intake v5 Calculator — Calculate protein intake v5 quickly and accurately.

🥩

Protein Intake v6 Calculator — Free Online Tool

Free Protein Intake v6 Calculator — Calculate protein intake v6 quickly and accurately.

🥩

Protein Intake v7 Calculator — Free Online Tool

Free Protein Intake v7 Calculator — Calculate protein intake v7 quickly and accurately.

🥩

Protein Intake v8 Calculator — Free Online Tool

Free Protein Intake v8 Calculator — Calculate protein intake v8 quickly and accurately.

🥩

Protein Intake v9 Calculator — Free Online Tool

Free Protein Intake v9 Calculator — Calculate protein intake v9 quickly and accurately.

📱

QR Code Generator - 二维码生成器

免费在线生成器 - qr code generator - 一键生成，简单好用

📱

QR Code Generator — Free Online Tool

Free QR Code Generator — Create custom QR codes instantly for URLs, text, WiFi, email, and phone numbers. Customize colors, size, and download as PNG.

📱

QR Code Reader - Scan QR Codes Free

Free online QR code reader - Scan and decode QR codes from images, supports all QR code formats

📱

QR Code Scanner - Scan QR Codes Online Free

Free online QR code scanner - Scan QR codes from images using your camera or upload images to decode QR codes

📐

Quadratic Formula Solver - AooPower

Solve quadratic equations.

🔧

Quantum Energy Calculator - AooPower

Calculate photon energy.

📋

RMD Calculator - Free Online Tool

Calculate Required Minimum Distributions from retirement accounts.

📐

RMS Calculator - AooPower

Calculate RMS levels.

📊

ROAS Calculator - Calculate Return on Ad Spend Free

Free online ROAS calculator - Calculate Return on Ad Spend for marketing campaigns

💹

ROI Calculator Calculator — Free Online Tool

Free ROI Calculator Calculator — Calculate roi calculator quickly and accurately.

📈

ROI Calculator — Free Online Tool

Free ROI Calculator — Calculate roi quickly and accurately online.

🔧

Radioactive Decay Calculator - AooPower

Calculate radioactive decay.

🎲

Random Name Generator - Free Online Tool

Free online random name generator - Generate random names for characters, babies, pets, and more

🎲

Random Name Picker - Free Online Tool

Pick random names from a list for raffles, classroom activities, team selection, and giveaways. Fair and truly random selection.

🎲

Random Number Calculator — Free Online Tool

Free Random Number Calculator — Random Number online tool.

🎲

Random Number Generator - Generate Random Numbers Free

Free online random number generator - Generate random numbers with custom range and options

🔧

Random Team Generator - Free Online Tool

Split a group of people into random teams. Supports equal or custom team sizes.

📐

Ratio Calculator - AooPower

Calculate ratios.

📖

Readability Score Calculator - Free Online Tool

Analyze text readability with Flesch-Kincaid, Gunning Fog, Coleman-Liau, and SMOG scores. Get grade level and reading ease metrics for your content.

📖

Readability Tester - 可读性测试

免费在线测试工具 - readability tester - 快速测试验证

📖

Reading Time Calculator — Free Online Tool

Free Reading Time Calculator — Reading Time online tool.

🔧

Recipe Scaler - Free Online Tool

Free Recipe Scaler - Scale any recipe up or down to serve any number of people. Automatically adjusts all ingredient quantities with smart unit conver

🔄

Refinance Calculator - Free Online Tool

Calculate savings from refinancing your mortgage.

🔍

Regex Tester - Test Regular Expressions Free

Free online regex tester - Test and debug regular expressions with real-time matching and highlighting

🔧

Relaxation Timer - Free Online Tool

Guided relaxation countdown with progressive muscle relaxation instructions and calming visuals.

🔧

Rent Calculator

Free online Rent Calculator

⚖️

Rent vs Buy Calculator - Free Online Tool

Compare the costs of renting versus buying a home.

💵

Rental Income Calculator - Free Online Tool

Calculate potential rental income and ROI for investment properties.

🔧

Rental Yield Calculator

Free Rental Yield Calculator - Calculate gross and net rental yield for investment properties. Compare rental returns across properties and estimate c

📡

Resonance Calculator - AooPower

Calculate resonance frequency.

📱

Responsive Design Tester - 响应式测试

响应式设计测试工具 - 在线预览网站在不同设备上的显示效果

📝

Resume Builder - Free Online Tool

Free online resume builder - Create a professional resume in minutes with our easy-to-use template, download as PDF

📄

Resume Builder Pro

Free online Resume Builder Pro

📅

Retirement Age Calculator - Free Online Tool

Calculate your optimal retirement age based on savings goals.

🏖️

Retirement Calculator 2026 - 401k Savings Calculator

Free retirement calculator to plan your 401k savings. Calculate how much you need to retire comfortably.

🏖️

Retirement Lifestyle Calculator - Free Online Tool

Plan your retirement lifestyle and estimate living costs.

🔧

Retirement Savings Calculator - Free Online Tool

Calculate how much you need to save for retirement.

💸

Retirement Withdrawal Calculator - Free Online Tool

Plan your retirement withdrawal strategy and sustainable income.

🔧

Reverb Calculator - AooPower

Calculate reverb time.

🗺️

Road Trip Budget Calculator - Free Online Tool

Plan your road trip budget including gas, lodging, and food.

🔧

Robots.txt Generator

免费在线生成器 - robots txt generator - 一键生成，简单好用

🔧

Roman Numeral Converter - Convert Roman Numerals Free

Free online Roman numeral converter - Convert between Roman numerals and numbers

📏

Room Area Calculator - Free Online Tool

Free Room Area Calculator - Calculate floor area, wall area, and volume of any room. Perfect for flooring, painting, tiling, and HVAC planning. Suppor

🏠

Roommate Expense Tracker - Free Online Tool

Track shared expenses between roommates. See who owes whom and settle debts with minimum transactions.

🔧

Roth vs Traditional IRA Calculator - Compare IRA Options

Free online Roth vs Traditional IRA calculator - Compare retirement account options

🏃

Running Pace Calculator - Pace, Speed & Split Times

Free Running Pace Calculator - Calculate pace, speed, finish time, and split times for any distance. Plan your 5K, 10K, half marathon, or marathon wit

📊

SQL Formatter - Free Online Tool

Free online SQL formatter - Format and beautify SQL queries, support MySQL, PostgreSQL, SQL Server

🎨

SVG Editor - SVG 编辑器

SVG 编辑器 - 在线 SVG 代码编辑和实时预览工具

🖼️

SVG to PNG Converter — Free Online Tool

Free SVG to PNG Converter - Convert SVG vector graphics to PNG images instantly in your browser. Custom size, transparent background, high quality.

💰

Salary Calculator 2026 - Hourly to Salary Converter

Free salary calculator to convert hourly wage to annual salary. Calculate weekly, monthly, and yearly income.

💰

Salary Negotiation Prep - Free Online Tool

Prepare for salary negotiations. Calculate your market value, build talking points, and practice counteroffers.

⏰

Salary to Hourly Calculator — Free Online Tool

Free Salary to Hourly Calculator — Calculate salary to hourly quickly and accurately.

🧾

Sales Tax Calculator — Free Online Tool

Free Sales Tax Calculator — Calculate sales tax quickly and accurately online.

🔄

Sample Rate Converter - AooPower

Convert sample rates.

💰

Savings Goal Calculator — Free Online Tool

Free Savings Goal Calculator — Savings Goal online tool.

📋

Schema Generator - Schema 标记生成器

免费在线生成器 - schema generator - 一键生成，简单好用

🎒

School Supply List

Free online School Supply List

🔬

Scientific Calculator - Advanced Math Calculator Free

Free online scientific calculator - Perform advanced mathematical calculations with trigonometric, logarithmic, and exponential functions

🔬

Scientific Notation Calculator

Convert between standard numbers and scientific notation. Perform arithmetic operations in scientific notation with step-by-step solutions.

🏆

Scoreboard Tracker - Free Online Tool

Track scores for any game or competition. Add players, adjust scores, and see the leaderboard.

📝

Scrabble Score Calculator - Free Online Tool

Calculate Scrabble word scores instantly. Includes letter values, word and letter multipliers.

📱

Screen PPI Calculator — Free Online Tool

Free Screen PPI Calculator — Calculate screen ppi quickly and accurately.

🖥️

Screen Recorder - Record Screen Online Free

Free online screen recorder - Record your screen directly in browser, no download required, save as WebM or GIF

📸

Screenshot to Code - Free Online Tool

Convert screenshots to HTML/CSS code templates. Upload a UI screenshot and get a starter code structure to build from.

📝

Sentence Counter - Free Online Tool

Count sentences, paragraphs, words, and characters in your text. Get detailed text statistics including average sentence length and reading time.

📄

Severance Pay Calculator 2026 - Layoff Package Calculator

Free severance pay calculator to estimate your layoff package. Calculate severance based on years of service and salary.

📦

Shipping Cost Estimator

Free online Shipping Cost Estimator

👞

Shoe Size Converter - Free Online Tool

Convert shoe sizes between US, UK, EU, and CM. Find your perfect fit with our comprehensive shoe size conversion chart.

🛍️

Shopify Profit

Free online Shopify Profit

⏱️

Shutter Speed Calculator - AooPower

Calculate optimal shutter speed for sharp photos.

🔧

Sick Leave Calculator — Free Online Tool

Free Sick Leave Calculator — Calculate sick leave quickly and accurately.

💵

Simple Interest Calculator — Free Online Tool

Free Simple Interest Calculator — Calculate simple interest quickly and accurately.

🗺️

Sitemap Generator - Sitemap 生成器

免费在线生成器 - sitemap generator - 一键生成，简单好用

📊

Skills Assessment

Free online Skills Assessment

🔧

Sleep Calculator - Find Your Optimal Bedtime & Wake Time

Free Sleep Calculator - Find the best time to go to bed or wake up based on sleep cycles. Optimize your sleep schedule for better rest and energy.

😴

Sleep Calculator Calculator — Free Online Tool

Free Sleep Calculator Calculator — Sleep Calculator online tool.

🔧

Slow Motion Calculator - AooPower

Calculate slow motion rates.

🔗

Slug Generator - Create URL-Friendly Slugs Free

Free online slug generator - Convert text to URL-friendly slugs for SEO optimization

🖼️

Social Media Image Sizer

Free online Social Media Image Sizer

📊

Social Proof Counter

Free online Social Proof Counter

💼

Social Security Calculator - Free Online Tool

Estimate your Social Security benefits at different retirement ages.

🔧

Space Distance Calculator - Free Online Tool

Calculate distances between planets, stars, and galaxies. Convert between light-years, AU, and parsecs.

🎤

Speaking Time Calculator — Free Online Tool

Free Speaking Time Calculator — Speaking Time online tool.

📊

Specific Gravity Calculator - AooPower

Calculate specific gravity.

🎤

Speech to Text - Free Voice Typing

Free online speech to text converter - Convert voice to text using browser speech recognition

🔧

Speed Distance Time Calculator - Free Online

Calculate speed, distance, or time when you know the other two. Supports mph, km/h, m/s, and knots.

🧾

Split Bill Calculator

Split restaurant bills fairly among friends. Handle unequal shares, shared items, individual items, tax, and tip distribution.

√

Square Root Calculator — Free Online Tool

Free Square Root Calculator — Calculate square root quickly and accurately.

🔧

Stamp Duty Calculator - Free Online Tool

Free Stamp Duty Calculator - Estimate stamp duty land tax (SDLT) on property purchases in the UK, Australia, and other countries. Calculate tax for fi

📉

Standard Deviation Calculator - AooPower

Calculate standard deviation.

🔧

Star Map Viewer - Free Online Tool

View an interactive star map based on your location and time. Identify constellations and bright stars.

🔧

Star Trail Calculator - AooPower

Calculate star trail exposure.

🔧

Startup Cost Calculator - Business Launch Budget Planner

Free Startup Cost Calculator - Estimate total costs to launch your business. Plan one-time and recurring expenses across categories like legal, equipm

📊

Statistics Calculator - Calculate Statistics Free

Free online statistics calculator - Calculate mean, median, mode, standard deviation, and more

👟

Step Counter Converter - Free Online Tool

Convert steps to distance, calories burned, and time walked. Calculate how far you walked based on your step count.

🔉

Stereo Width Calculator - AooPower

Calculate stereo width.

📈

Stock Average Calculator - Calculate Average Cost Basis Free

Free online stock average calculator - Calculate average cost basis for stock investments

📈

Stock Profit Calculator - Calculate Stock Trading Profits

Free online stock profit calculator - Calculate stock trading profits, losses, and ROI

🔬

Stoichiometry Calculator - AooPower

Calculate reaction quantities.

⏱️

Stopwatch Calculator — Free Online Tool

Free Stopwatch Calculator — Stopwatch online tool.

⏱️

Stopwatch with Laps - Free Online Timer

Free online stopwatch with lap times - Accurate stopwatch with lap/split time functionality, download lap times

💿

Storage Calculator Calculator — Free Online Tool

Free Storage Calculator Calculator — Calculate storage calculator quickly and accurately.

💾

Storage Usage Analyzer

Free online Storage Usage Analyzer

🔧

Storm Tracker - Free Online Tool

Track storms and severe weather in your area.

📡

Streaming Bitrate Calculator - AooPower

Calculate streaming bitrate.

🔧

Stress Level Quiz - Free Online Tool

Assess your current stress level with a quick quiz based on the Perceived Stress Scale. Get personalized tips.

🔧

Stretching Timer

Free online Stretching Timer

📚

Student Loan Calculator 2026 - Student Debt Calculator

Free student loan calculator to calculate monthly payments and total interest. Plan your student debt repayment.

📚

Study Time Calculator — Free Online Tool

Free Study Time Calculator — Calculate study time quickly and accurately.

📚

Study Time v10 Calculator — Free Online Tool

Free Study Time v10 Calculator — Calculate study time v10 quickly and accurately.

📚

Study Time v4 Calculator — Free Online Tool

Free Study Time v4 Calculator — Calculate study time v4 quickly and accurately.

📚

Study Time v5 Calculator — Free Online Tool

Free Study Time v5 Calculator — Calculate study time v5 quickly and accurately.

📚

Study Time v6 Calculator — Free Online Tool

Free Study Time v6 Calculator — Calculate study time v6 quickly and accurately.

📚

Study Time v7 Calculator — Free Online Tool

Free Study Time v7 Calculator — Calculate study time v7 quickly and accurately.

📚

Study Time v8 Calculator — Free Online Tool

Free Study Time v8 Calculator — Calculate study time v8 quickly and accurately.

📚

Study Time v9 Calculator — Free Online Tool

Free Study Time v9 Calculator — Calculate study time v9 quickly and accurately.

📝

Subtitle Timing Calculator - AooPower

Calculate subtitle timing.

🔧

Sun Position Finder - AooPower

Find sun position and direction.

🔧

Sunrise Sunset Calculator - Free Online Tool

Calculate sunrise, sunset, golden hour, and twilight times for any location and date.

💧

Surface Tension Calculator - AooPower

Calculate surface tension.

🔧

Swimming Calories Calculator

Calculate calories burned swimming by stroke, duration, and intensity. Compare different swimming strokes and plan your pool workouts.

🔧

Swimming Pace Calculator — Free Online Tool

Free Swimming Pace Calculator — Calculate swimming pace quickly and accurately.

✏️

System of Equations Solver - AooPower

Solve linear systems.

🔥

TDEE Calculator — Free Online Tool

Free TDEE Calculator - Calculate your Total Daily Energy Expenditure and find out how many calories you burn daily.

📊

TSV to CSV Converter — Free Online Tool

Free TSV to CSV Converter - Convert tab-separated values to comma-separated values instantly. Handle quoting, escaping, and custom delimiters.

⏱️

Task Timer

Free online Task Timer

🧾

Tax Calculator - Free Online Tool

Free online tax calculator. Estimate your federal and state income tax, effective tax rate, and take-home pay for any filing status.

📋

Tax Withholding Calculator 2026 - IRS W-4 Calculator

Free tax withholding calculator to estimate your federal tax withholding. Calculate W-4 allowances and take-home pay.

🔭

Telescope Magnification Calculator - Free Online Tool

Calculate telescope magnification, field of view, and exit pupil for any eyepiece-telescope combination.

📧

Temp Email Generator - Disposable Email Free

Free online temporary email generator - Create disposable email addresses instantly, protect your privacy

🌡️

Temperature Converter Pro - °F °C K °R Converter

Free Temperature Converter Pro - Convert between Fahrenheit, Celsius, Kelvin, Rankine, and more. Includes common reference points, batch conversion, a

📜

Terms Of Service Generator

Free online Terms Of Service Generator

📝

Test Score Calculator — Free Online Tool

Free Test Score Calculator — Calculate test score quickly and accurately.

🔤

Text Case Converter - 大小写转换

免费在线转换工具 - text case converter - 快速转换，支持多种格式

🔍

Text Compare - 文本对比工具

免费在线文本比较工具 - 对比两段文本差异，高亮显示新增、删除和修改内容

🔍

Text Diff Checker - 文本对比

免费在线检查工具 - text diff checker - 快速检测分析

🔐

Text Encryptor - 文本加密

文本加密解密工具 - AES 加密保护敏感文本，安全的在线加密工具

🔧

Text Repeater - Free Online Tool

Repeat any text multiple times with custom separator. Generate repeated text for testing, filler content, or fun messages instantly.

🔄

Text Reverser - Free Online Tool

Reverse text, words, or sentences instantly. Flip text backwards, reverse word order, or mirror entire paragraphs with this free online tool.

🔄

Text Reverser - Reverse Text & Words Free

Free online text reverser - Reverse text, words, or sentences instantly

🔢

Text to Binary Converter — Free Online Tool

Free Text to Binary Converter - Convert text to binary code and binary to text instantly. Supports ASCII, UTF-8, and multiple output formats.

🔊

Text to Speech - Free TTS Converter

Free online text to speech converter - Convert text to natural sounding speech, download as MP3

📏

Thermal Expansion Calculator - AooPower

Calculate thermal expansion.

🔋

Thevenin Calculator - AooPower

Calculate Thevenin equivalent.

🖼️

Thumbnail Maker - Create Custom Thumbnails Free

Free online thumbnail maker - Create custom thumbnails for YouTube and social media

🎵

Tiktok Caption Maker

Free online Tiktok Caption Maker

🔧

Tile Calculator Calculator — Free Online Tool

Free Tile Calculator Calculator — Calculate tile calculator quickly and accurately.

⏱️

Time Duration Calculator - Calculate Time Difference Free

Free online time duration calculator - Calculate time difference between two dates or times

⏰

Time Lapse Interval - AooPower

Calculate time lapse intervals.

🌍

Time Zone Calculator — Free Online Tool

Free Time Zone Calculator — Calculate time zone quickly and accurately online.

🌍

Time Zone Converter - Convert Time Between Timezones Free

Free online time zone converter - Convert time between different time zones worldwide instantly

⏰

Timer Calculator — Free Online Tool

Free Timer Calculator — Timer online tool.

⏰

Timestamp Converter - 时间戳转换

免费在线转换工具 - timestamp converter - 快速转换，支持多种格式

💵

Tip Calculator Calculator — Free Online Tool

Free Tip Calculator Calculator — Calculate tip calculator quickly and accurately.

💵

Tip Calculator — Free Online Tool

Free Tip Calculator — Calculate tips quickly and split bills fairly among friends.

🔧

Tire Size Calculator

Decode tire sizes, compare tire dimensions, and calculate speedometer differences. Understand what tire numbers mean and find equivalent tire sizes.

🏅

Tournament Bracket Generator - Free Online Tool

Generate single-elimination tournament brackets for 4-32 teams. Track match results and advance winners.

💰

Travel Budget Planner

Free online Travel Budget Planner

🔧

Travel Insurance Calculator - Free Online Tool

Estimate travel insurance costs for your trip.

🔺

Triangle Area Calculator — Free Online Tool

Free Triangle Area Calculator — Calculate triangle area quickly and accurately.

🔧

Trivia Quiz Maker - Free Online Tool

Play random trivia questions from various categories. Test your knowledge and track your score.

🔧

Tweet Formatter

Free online Tweet Formatter

🔗

URL Encoder Decoder - Free Online Tool

Encode and decode URLs and URI components. Convert special characters to percent-encoding and back instantly.

🔗

URL Shortener - URL 缩短器

免费在线工具 - url shortener - 简单好用，无需注册

🔗

URL Validator - Check URL Format Free

Free online URL validator - Check if URLs are valid and properly formatted

🆔

UUID Generator - Generate UUID v4 Free

Free online UUID generator - Generate UUID v4 identifiers instantly, bulk generate multiple UUIDs

🔧

Umbrella Insurance Calculator - Free Online Tool

Calculate umbrella insurance needs for liability protection.

🔄

Unit Converter - 单位换算

免费在线转换工具 - unit converter - 快速转换，支持多种格式

🔄

Unit Converter Calculator — Free Online Tool

Free Unit Converter Calculator — Calculate unit converter quickly and accurately online.

🔍

User Agent Parser - Parse UA String Free

Free online user agent parser - Parse and analyze browser user agent strings to identify browser, OS, and device

💡

Utility Bill Splitter - Free Online Tool

Split utility bills among roommates. Supports equal, proportional by room size, or custom splits.

🏖️

Vacation Days Calculator

Free Vacation Days Calculator - Track your PTO balance, calculate accrued vacation days, and plan time off. See how many vacation days you have left a

💉

Vaccination Schedule

Free online Vaccination Schedule

📐

Variance Calculator - AooPower

Calculate variance.

🔧

Velocity Calculator

Free online Velocity Calculator

📐

Video Aspect Ratio - AooPower

Calculate video aspect ratios.

🔄

Video Audio Sync - AooPower

Fix audio sync.

📹

Video Bitrate Calculator - AooPower

Calculate video bitrate.

🗜️

Video Compression Calculator - AooPower

Calculate compression ratios.

🎬

Video Compressor - Reduce Video Size Free

Free online video compressor - Compress MP4, AVI, WEBM videos without losing quality, reduce file size instantly

⏱️

Video Duration Calculator - AooPower

Calculate video duration.

🔧

Video Encoding Time - AooPower

Estimate encoding time.

⚙️

Video Export Settings - AooPower

Guide for export settings.

💾

Video File Size Estimator - AooPower

Estimate video file sizes.

🔧

Video Quality Score - AooPower

Calculate quality metrics.

🔧

Video Render Time - AooPower

Estimate render time.

📺

Video Resolution Calculator - AooPower

Calculate video resolutions.

🎥

Video Stabilization Guide - AooPower

Guide for stabilization.

📦

Video Storage Calculator - AooPower

Calculate storage needs.

🎬

Video to GIF Converter - Free Online Tool

Free online video to GIF converter - Convert MP4, AVI, WEBM videos to animated GIFs instantly

🔧

Visa Requirement Checker

Free online Visa Requirement Checker

🔧

Viscosity Calculator - AooPower

Calculate viscosity.

💧

Water Intake Calculator — Free Online Tool

Free Water Intake Calculator — Water Intake online tool.

🔧

Wave Calculator

Free online Wave Calculator

🔧

Wavelength Calculator - AooPower

Convert wavelength/frequency.

💒

Wedding Budget Calculator - Free Wedding Cost Planner

Free Wedding Budget Calculator - Plan your dream wedding within budget. Track expenses across categories like venue, catering, photography, and more.

🗓️

Weekly Schedule

Free online Weekly Schedule

📆

Weeks Between Dates Calculator — Free Online Tool

Free Weeks Between Dates Calculator — Calculate weeks between dates quickly and accurately.

⚖️

Weight Converter Pro - kg, lbs, oz, g, stone Converter

Free Weight Converter Pro - Convert between pounds, kilograms, ounces, grams, stones, metric tons, and more. Batch conversion and common reference wei

🔧

What Is My IP - 我的 IP 地址

免费在线 IP 地址查询工具 - 查看你的公网 IP、位置、ISP 等详细信息

🔧

WhatsApp QR Code Generator - Create WhatsApp Links Free

Free online QR code generator for WhatsApp - Create WhatsApp click-to-chat links and QR codes instantly

🔊

White Noise Generator - Free Online Tool

Generate white, pink, and brown noise for focus, sleep, and relaxation. Adjustable volume and frequency.

🔧

Wholesale Price

Free online Wholesale Price

🔧

WiFi QR Code Generator - Create WiFi QR Codes Free

Free online WiFi QR code generator - Create QR codes for WiFi networks so guests can connect instantly by scanning

📝

Word Counter - 字数统计

免费在线工具 - word counter - 简单好用，无需注册

📝

Word Counter Calculator — Free Online Tool

Free Word Counter Calculator — Word Counter online tool.

📊

Word Frequency Counter - Free Online Tool

Count word frequency in any text. Analyze word usage patterns, find most common words, and generate word frequency statistics instantly.

⌨️

Words Per Minute Calculator — Free Online Tool

Free Words Per Minute Calculator — Calculate words per minute quickly and accurately.

⏰

Work Hours Calculator

Free Work Hours Calculator - Calculate total hours worked, overtime, and pay for any time period. Track weekly hours, break deductions, and generate t

⚖️

Work-Life Balance Quiz - Free Online Tool

Assess your work-life balance with a quick quiz. Get a score and personalized recommendations.

🌍

World Clock - Free Online Tool

View current time in multiple time zones around the world. Compare times across cities with our free world clock tool.

📄

XML Validator - Validate & Format XML Free

Free online XML validator - Validate and format XML data instantly

📊

XML to CSV Converter — Free Online Tool

Free XML to CSV Converter - Convert XML data to CSV format instantly. Extract elements and attributes into clean tabular data for spreadsheets.

📋

YAML Formatter & Validator — Free Online Tool

Free YAML Formatter - Format, validate, and beautify YAML files online. Convert between YAML and JSON with syntax highlighting.

🎯

Yahtzee Scorer - Free Online Tool

Track Yahtzee scores for multiple players. Auto-calculate upper and lower sections with bonus.

🔧

Yoga Calories Calculator

Calculate calories burned during different types of yoga. Compare Hatha, Vinyasa, Bikram, Power Yoga and more based on your weight and duration.

🔧

YouTube Thumbnail Downloader - Get Thumbnails Free

Free online YouTube thumbnail downloader - Download YouTube video thumbnails in all resolutions (HD, SD, MQ) instantly

🔧

YouTube Thumbnail Downloader - 缩略图下载

免费在线 YouTube 缩略图下载器 - 输入视频 URL 获取所有分辨率的缩略图

🔧

Youtube Title Generator

Free online Youtube Title Generator

🧪

pH Calculator - AooPower

Calculate pH levels.

🛠️

免费在线工具

使用我们的免费在线工具进行计算、转换和生成。