Free Online Tools
Simple, fast, and private tools for everyday tasks. No sign-up required.
AI Tools 4
AI Proofreader
Proofread text locally with an AI model running in your browser via WebGPU
AI Speech to Text
Transcribe audio to text locally with Whisper AI running in your browser via WebGPU
AI Text Summarizer
Summarize long texts locally with an AI model running in your browser via WebGPU
AI Word Explorer
Find synonyms, antonyms, and related words with AI running in your browser via WebGPU
Calculators 4
Percentage Calculator
Calculate percentages easily โ find X% of Y, what percent X is of Y, or percentage change.
BMI Calculator
Calculate your Body Mass Index and find out your weight category.
Character Counter
Count characters, words, sentences, and paragraphs in your text instantly.
Unit Converter
Convert between common units โ length, weight, temperature, area, and more.
Generators 6
Password Generator
Generate strong, random passwords with customizable length and character types.
QR Code Generator
Create QR codes for URLs, text, Wi-Fi, and more. Download as PNG.
UUID Generator
Generate random UUIDs (v4) instantly. Copy one or bulk generate multiple.
Lorem Ipsum Generator
Generate placeholder text in paragraphs, sentences, or words for your designs.
Color Picker
Pick colors, convert between HEX, RGB, and HSL formats, and build palettes.
CSS Gradient Generator
Create beautiful CSS gradients visually. Copy the CSS code with one click.
Converters 4
Base64 Encoder / Decoder
Encode text to Base64 or decode Base64 back to text instantly.
Unix Timestamp Converter
Convert between Unix timestamps and human-readable dates. See the current timestamp live.
URL Encoder / Decoder
Encode or decode URLs and query strings. Handle special characters safely.
JSON to CSV Converter
Convert JSON arrays to CSV format. Download or copy the result instantly.
Formatters 2
Developer Tools 2
Utilities 2
Finance 45
Compound Interest Calculator
Calculate compound interest with customizable principal, rate, period, and compounding frequency.
Loan Calculator
Calculate monthly loan payments, total interest, and amortization schedules.
Mortgage Calculator
Estimate monthly mortgage payments with down payment, interest rate, and loan term.
Savings Goal Calculator
Find out how long it will take to reach your savings goal with monthly deposits.
Investment Return Calculator
Project your investment growth over time with initial amount, returns, and monthly contributions.
Retirement Calculator
Estimate how much you need for retirement based on your age, savings, and contributions.
Income Tax Calculator
Estimate your income tax based on annual income, deductions, and filing status.
Currency Converter
Convert between currencies using current or custom exchange rates.
Tip Calculator
Calculate tip amount and split the bill between multiple people.
Salary to Hourly Calculator
Convert annual salary to hourly rate, or hourly rate to annual salary.
Debt Payoff Calculator
Calculate how long to pay off debt and total interest paid.
ROI Calculator
Calculate Return on Investment percentage from cost and gain.
Inflation Calculator
Calculate the future value of money adjusted for inflation.
Discount Calculator
Calculate the final price after applying a discount.
Sales Tax Calculator
Calculate sales tax amount and total price including tax.
Auto Loan Calculator
Calculate monthly car loan payments and total interest.
Home Equity Calculator
Calculate your home equity from property value and mortgage balance.
Net Worth Calculator
Calculate your net worth from assets and liabilities.
FIRE Number Calculator
Calculate your Financial Independence Retire Early target number.
Emergency Fund Calculator
Calculate how much you need in your emergency fund.
Dividend Yield Calculator
Calculate dividend yield from annual dividend and stock price.
Stock Return Calculator
Calculate total return on a stock investment including dividends.
Expense Ratio Calculator
See how fund expense ratios impact your returns over time.
Mortgage Payoff Calculator
Calculate how fast you can pay off your mortgage
Rental Yield Calculator
Calculate gross and net rental yield
Retirement Savings Calculator
Project your retirement savings growth
Paycheck Calculator
Estimate your take-home pay
CD Interest Calculator
Calculate certificate of deposit earnings
Electricity Cost Calculator
Calculate electricity cost for appliances
Life Insurance Calculator
Estimate how much life insurance you need
Down Payment Calculator
Calculate the down payment for a home
Hourly to Salary Calculator
Convert hourly rate to annual salary
Rent vs Buy Calculator
Compare renting versus buying a home
Tax Bracket Calculator
Find your tax bracket
Pension Calculator
Estimate pension benefit
Fuel Cost Calculator
Calculate fuel cost for a trip
SIP Calculator
Calculate SIP returns
Loan Comparison Calculator
Compare two loan options
Amortization Calculator
Generate loan amortization schedule
50/30/20 Budget Calculator
Apply the 50/30/20 budgeting rule
Debt-to-Income Calculator
Calculate your debt-to-income ratio
Cost of Living Calculator
Compare cost of living between cities
Car Affordability Calculator
Calculate how much car you can afford
Wedding Budget Calculator
Plan and allocate your wedding budget
Child Education Calculator
Calculate education savings needed
Health & Fitness 31
Calorie Calculator
Calculate your daily calorie needs based on age, weight, height, and activity level.
Body Fat Calculator
Estimate your body fat percentage using the US Navy method.
Ideal Weight Calculator
Calculate your ideal weight range based on height and gender using multiple formulas.
Water Intake Calculator
Calculate your recommended daily water intake based on weight and activity level.
Pregnancy Due Date Calculator
Calculate your estimated due date based on the first day of your last menstrual period.
Sleep Calculator
Find the best bedtime based on sleep cycles for your desired wake-up time.
Running Pace Calculator
Calculate running pace per km or mile from distance and time.
Heart Rate Zone Calculator
Calculate target heart rate training zones.
Macro Calculator
Calculate daily macronutrient targets in grams.
One Rep Max Calculator
Estimate your one-rep max using the Brzycki formula.
Pregnancy Weight Gain Calculator
Calculate recommended weight gain during pregnancy.
Blood Alcohol Calculator
Estimate blood alcohol content based on drinks, weight, and time.
Lean Body Mass Calculator
Calculate lean body mass from weight and body fat percentage.
VO2 Max Calculator
Estimate your VO2 max from a Cooper test or timed run.
Waist-Hip Ratio Calculator
Calculate your waist-to-hip ratio for health risk assessment.
Walking Calorie Calculator
Calculate calories burned while walking based on weight, distance, and speed.
BAC Calculator
Estimate blood alcohol concentration
Protein Intake Calculator
Calculate daily protein needs
Running Pace Calculator
Calculate running pace per km or mile from distance and time.
Ideal Sleep Calculator
Find recommended sleep by age
Carbon Footprint Calculator
Estimate annual carbon footprint
TDEE Calculator
Calculate Total Daily Energy Expenditure
BMR Calculator
Calculate your Basal Metabolic Rate
Intermittent Fasting Timer
Track intermittent fasting windows
Blood Pressure Checker
Classify blood pressure readings
Eyesight Test
Simple online visual acuity screening
Meditation Timer
Timer for guided meditation sessions
Stretch Reminder
Periodic reminders to stretch and move
Exercise Calorie Calculator
Calculate calories burned by exercise type
Hydration Tracker
Track daily water intake
Blood Type Compatibility
Check possible child blood types from parents
Date & Time 18
Age Calculator
Calculate your exact age in years, months, and days from your birth date.
Date Difference Calculator
Calculate the number of days, weeks, and months between two dates.
Countdown Timer
Count down the days, hours, and minutes until a specific date.
Timezone Converter
Convert times between different timezones.
Working Days Calculator
Calculate the number of business/working days between two dates.
Date Add/Subtract Calculator
Add or subtract days from a date.
Week Number Calculator
Find the ISO week number for any date.
Pomodoro Timer
25/5 minute work and break timer
Online Stopwatch
Simple stopwatch with lap times
Birthday Countdown
Count down to your birthday
World Clock
View current time worldwide
Online Stopwatch
Simple stopwatch with lap times
Calendar Generator
Generate printable monthly calendars
Time Zone Meeting Planner
Find meeting times across time zones
Holiday Calendar
View public holidays by country
Date Format Converter
Convert dates between different formats
Day of Year Calculator
Calculate the day number in a year
Excel Calendar Download
Download monthly or annual calendars as styled Excel files
Text Tools 24
Word Counter
Count words, sentences, paragraphs, and estimate reading time for any text.
Text Diff Checker
Compare two texts and highlight the differences between them.
String Length Calculator
Measure the byte length of strings in UTF-8, UTF-16, and other encodings.
Text to Binary Converter
Convert text to binary representation and binary to text.
Remove Duplicate Lines
Remove duplicate lines from text, keeping unique entries.
Line Counter
Count lines, blank lines, and non-blank lines in text.
Japanese Dummy Text Generator
Generate Japanese placeholder text for designs and mockups.
String Encoder/Decoder
Encode and decode strings in various formats
HTML to Markdown
Convert HTML to Markdown format
Text Case Converter
Convert text case
Text Repeater
Repeat text multiple times
Whitespace Remover
Remove extra whitespace
Emoji Picker
Search and copy emojis
Reading Time Calculator
Estimate reading time
Emoji to Text Converter
Convert emojis to text descriptions
Lorem Ipsum Generator
Generate placeholder text in paragraphs, sentences, or words for your designs.
Text to Speech Preview
Preview text-to-speech using Web Speech API
Markdown Table Generator
Generate Markdown tables visually
Text Line Sorter
Sort lines of text alphabetically or numerically
Find and Replace
Search and replace text with regex support
Text to Handwriting
Convert text to handwriting-style font
String Reverse
Reverse any string of text
Text to ASCII Art
Convert text to ASCII art
Text Hash Comparator
Compare two texts by their hash values
Converters 24
HTML to Text Converter
Strip HTML tags and convert HTML to plain text.
CSV to JSON Converter
Convert CSV data to JSON format. Paste CSV and get structured JSON output.
Temperature Converter
Convert between Celsius, Fahrenheit, and Kelvin.
Weight Converter
Convert between kg, pounds, ounces, grams, and more.
Length Converter
Convert between meters, feet, inches, centimeters, and more.
Speed Converter
Convert between km/h, mph, m/s, and knots.
Data Storage Converter
Convert between bytes, KB, MB, GB, and TB.
Area Converter
Convert between area units
Volume Converter
Convert between volume units
Pressure Converter
Convert between pressure units
Energy Converter
Convert between energy units
Time Unit Converter
Convert between time units
Angle Converter
Convert degrees, radians, gradians
Frequency Converter
Convert frequency units
Force Converter
Convert force units
Power Converter
Convert power units
JSON to YAML Converter
Convert JSON to YAML format
Color Format Converter
Convert between HEX, RGB, HSL, and more
Markdown to HTML
Convert Markdown text to HTML
CSV to SQL
Generate SQL INSERT statements from CSV
JSON to TypeScript
Generate TypeScript interfaces from JSON
Number to Words
Convert numbers to written words
Tsubo โ mยฒ Converter
Convert between tsubo, square meters, and tatami
Markdown to PDF
Convert Markdown text to downloadable PDF documents
Design & Creative 21
HEX to RGB Converter
Convert HEX color codes to RGB and vice versa.
Aspect Ratio Calculator
Calculate aspect ratios and resize dimensions while maintaining proportions.
Color Palette Generator
Generate harmonious color palettes.
Font Size Converter
Convert between px, em, rem, pt font sizes.
Color Code Converter
Convert between HEX, RGB, and HSL color formats
CSS Gradient Generator
Generate CSS gradient code with preview
Box Shadow Generator
Generate CSS box-shadow with live preview
Color Blindness Simulator
Simulate color blindness
Font Pairing Generator
Font pairing suggestions
Color Code Converter
Convert between HEX, RGB, and HSL color formats
Image Compressor
Compress images without losing quality
SVG Viewer & Editor
Preview and edit SVG code
CSS Gradient Generator
Generate CSS gradient code with preview
CSS Flexbox Generator
Generate CSS Flexbox layouts visually
CSS Grid Generator
Generate CSS Grid layouts visually
Border Radius Generator
Generate CSS border-radius values visually
Text Shadow Generator
Generate CSS text-shadow values
Color Contrast Checker
Check WCAG color contrast ratios
CSS Animation Generator
Generate CSS keyframe animations
Favicon Generator
Generate favicons from text or emoji
Image Resizer
Resize images to any dimension with social media presets
Developer Tools 35
Number Base Converter
Convert numbers between binary, octal, decimal, and hexadecimal.
JSON Validator
Validate JSON syntax and find errors with detailed error messages.
Cron Expression Parser
Parse cron expressions and see the next scheduled run times in human-readable format.
HTML Entity Encoder
Encode and decode HTML entities. Convert special characters to their HTML entity equivalents.
JSON Minifier
Minify JSON by removing whitespace.
CSS Minifier
Minify CSS by removing comments and whitespace.
JavaScript Minifier
Minify JavaScript by removing whitespace and comments.
JWT Decoder
Decode JSON Web Tokens to see header and payload.
IP Address Lookup
Find your public IP address and network information.
SQL Formatter
Format and beautify SQL queries with proper indentation.
XML Formatter
Format and beautify XML with proper indentation.
YAML to JSON Converter
Convert YAML to JSON and JSON to YAML.
TOML to JSON Converter
Convert TOML to JSON and JSON to TOML.
Chmod Calculator
Calculate Unix file permissions in numeric and symbolic notation.
Cron Expression Parser
Parse cron expressions and see the next scheduled run times in human-readable format.
IP Subnet Calculator
Calculate subnet details from IP and CIDR
Unix Timestamp Converter
Convert Unix timestamps to human-readable dates
Hex to Decimal Converter
Convert hex to decimal
ASCII Table
View ASCII character table
HTTP Status Codes
HTTP status code reference
HTML Minifier
Minify HTML code
Code Diff Checker
Compare code snippets
URL Parser
Parse URL components
Binary to Text Converter
Convert binary to text
Image to Base64
Convert images to Base64
Cron Expression Generator
Generate and validate cron expressions
Password Strength Checker
Check how strong your password is
JSONPath Evaluator
Evaluate JSONPath queries on JSON data
CSP Header Generator
Generate Content Security Policy headers
CORS Header Tester
Test and understand CORS headers
HTML Table Generator
Generate HTML tables with a visual editor
Color to Tailwind
Find the closest Tailwind CSS color class
TypeScript to JSON Schema
Convert TypeScript types to JSON Schema
Placeholder Image Generator
Generate placeholder image URLs
Git Command Builder
Build Git commands with a visual interface
Business 14
Break-Even Calculator
Calculate the break-even point in units and revenue.
Profit Margin Calculator
Calculate gross and net profit margins from cost and revenue.
Markup Calculator
Calculate selling price from cost and markup percentage.
Invoice Generator
Create professional invoices instantly
Business Name Generator
Generate creative business name ideas
Employee Cost Calculator
Calculate the true cost of hiring an employee
Customer Lifetime Value Calculator
Calculate customer lifetime value (CLV)
Churn Rate Calculator
Calculate customer churn rate
MRR Calculator
Calculate Monthly Recurring Revenue
CAC Calculator
Calculate Customer Acquisition Cost
Startup Runway Calculator
Calculate how long your startup funding will last
Pricing Calculator
Calculate optimal pricing with cost-plus method
Meeting Cost Calculator
Calculate the cost of meetings
NPS Calculator
Calculate Net Promoter Score from survey responses
Education 15
GPA Calculator
Calculate your GPA from credits and grades.
Grade Calculator
Calculate what grade you need on remaining assignments.
Typing Speed Test
Test your typing speed in WPM
Roman Numeral Converter
Convert between decimal numbers and Roman numerals instantly.
Binary Quiz
Test your binary conversion skills with interactive quizzes.
Vocabulary Quiz
Expand your vocabulary with multiple-choice word quizzes.
Scholarship & Loan Calculator
Calculate student loan monthly payments and total interest.
Study Abroad Cost Calculator
Estimate the total cost of studying abroad with a detailed breakdown.
Pomodoro Study Planner
Plan your study sessions with the Pomodoro Technique.
Flashcard Maker
Create and study flashcards online
Study Timer
Timer designed for focused study sessions
Citation Generator
Generate citations in APA, MLA, and Chicago formats
Essay Word Counter
Count words, characters, and paragraphs in essays
Multiplication Table
Interactive multiplication table up to 20ร20
Periodic Table
Interactive periodic table of elements
Math & Education 22
Scientific Notation Converter
Convert numbers to and from scientific notation.
Binary Calculator
Perform arithmetic on binary numbers.
Fraction Calculator
Add, subtract, multiply, and divide fractions.
Pythagorean Theorem Calculator
Calculate the hypotenuse of a right triangle.
Area Calculator
Calculate the area of rectangles, circles, and triangles.
Random Number Generator
Generate random numbers within a specified range.
Quadratic Equation Solver
Solve quadratic equations axยฒ + bx + c = 0.
Logarithm Calculator
Calculate logarithms with any base.
Standard Deviation Calculator
Calculate mean, variance, and standard deviation of a data set.
Mean, Median, Mode Calculator
Calculate mean, median, and mode of a number set.
Percentage Change Calculator
Calculate percentage increase or decrease
GCD & LCM Calculator
Find greatest common divisor and least common multiple
Prime Number Checker
Check if a number is prime
Fibonacci Calculator
Generate Fibonacci sequence
Permutation & Combination
Calculate nPr and nCr
Matrix Calculator
Calculate matrix operations
Statistics Calculator
Calculate mean, median, mode, and more
Probability Calculator
Calculate probabilities for common distributions
Number Sequence Finder
Detect patterns in number sequences
Base-N Calculator
Perform arithmetic in any number base
Triangle Calculator
Calculate triangle properties from sides and angles
Circle Calculator
Calculate circle properties from radius or diameter
SEO & Marketing 10
SEO Meta Tag Checker
Analyze meta tags and preview search appearance.
Keyword Density Checker
Analyze keyword frequency and density in content.
URL Slug Generator
Generate SEO-friendly URL slugs from any text.
robots.txt Generator
Generate robots.txt files for your website
Sitemap XML Generator
Generate sitemap XML for your website
Open Graph Preview
Preview Open Graph meta tags for social media
Heading Hierarchy Checker
Check HTML heading hierarchy for SEO
Readability Score Checker
Calculate text readability scores
SEO Dummy Text Generator
Generate SEO-friendly placeholder text
Canonical URL Checker
Validate and generate canonical URLs
Crypto & Web3 12
Crypto Profit Calculator
Calculate cryptocurrency profit and loss including fees.
Mining Profit Calculator
Calculate cryptocurrency mining profitability.
Gas Fee Calculator
Calculate Ethereum transaction gas fees in ETH and USD.
Staking Reward Calculator
Calculate staking rewards from amount, APY, and duration.
NFT Profit Calculator
Calculate NFT trading profit after fees
DeFi Yield Calculator
Calculate DeFi farming yields with compounding
Token Vesting Calculator
Calculate vested and unvested token amounts
Crypto Tax Calculator
Estimate crypto capital gains tax
Hash Rate Converter
Convert hash rate units
Wallet Address Validator
Validate cryptocurrency wallet addresses
Crypto Portfolio Tracker
Track cryptocurrency portfolio value
Impermanent Loss Calculator
Calculate DeFi impermanent loss
Productivity 9
To-Do List
Simple to-do list with local storage
Habit Tracker
Track daily habits and streaks
Decision Maker
Make random choices from a list
Eisenhower Matrix
Prioritize tasks with the Eisenhower Matrix
Simple Notepad
Quick note-taking with local storage
Time Tracker
Track time spent on tasks
Focus Timer
Customizable focus and break timer
Kanban Board
Simple drag-and-drop Kanban board
Meeting Agenda Generator
Create structured meeting agendas with title, participants, and timed topics
Lifestyle 14
Shoe Size Converter
Convert shoe sizes between regions
Clothing Size Converter
Convert clothing sizes between regions
Pet Age Calculator
Calculate pet age in human years
Cooking Unit Converter
Convert cooking measurements
Travel Packing Checklist
Generate packing lists for trips
Time Until Event
Countdown to any date and time
Random Name Generator
Generate random names
Internet Speed Test
Estimate your internet connection speed
Event Countdown
Countdown timer to any event
Ring Size Converter
Convert ring sizes between US, UK, EU, and Japan standards
Bill Split Calculator
Split bills equally among friends with tip calculation
Caffeine Calculator
Track daily caffeine intake and estimate when it wears off
Fuel Cost Calculator
Estimate fuel expenses for any trip based on distance, efficiency, and price
Sleep Cycle Calculator
Find optimal bedtime or wake-up time based on 90-minute sleep cycles