All tools
Developer Tools
Open category →Base64 Encode & Decode
Convert text to Base64 and back, with full Unicode support and an option for the URL-safe alphabet used in JWTs and web addresses.
CSV to JSON Converter
Paste CSV or spreadsheet data and get a JSON array of objects or arrays, with smart handling of quotes, numbers and empty cells.
Hash Generator
Hash text or a file with five common algorithms at once and check a download against a published checksum.
JSON Formatter & Validator
Paste messy JSON to beautify it, check it for errors, or minify it for production. Your data never leaves your browser.
JSON to CSV Converter
Paste a JSON array of objects and get a clean CSV file with one column per field, ready for any spreadsheet.
JWT Decoder
Paste a JWT to see its header and payload as formatted JSON, check when it expires and verify HS256, HS384 or HS512 signatures.
Number Base Converter
Type a number in binary, octal, decimal, hex or a custom base and see it in all the others at once, with exact results for numbers of any size.
Regex Tester
Write a regular expression, paste some text and instantly see every match, its capture groups and the result of a find-and-replace.
Unix Timestamp Converter
Turn an epoch timestamp into a human-readable date in UTC and your time zone, or convert any date and time into a Unix timestamp.
URL Encode & Decode
Encode text so it is safe to put in a URL, or decode percent-encoded links back into readable text.
Text Tools
Open category →Case Converter
Switch text between UPPERCASE, lowercase, Title Case, Sentence case and programmer formats like camelCase and snake_case.
Lorem Ipsum Generator
Create dummy text for designs, mock-ups and layouts, in exactly the amount you need.
Remove Duplicate Lines
Paste a list and get back each line only once, with options for letter case, extra spaces, empty lines and sorting.
Slug Generator
Convert page titles into lowercase, hyphenated URL slugs that are readable, safe in any browser and good for SEO.
Word Counter
Paste or type any text to count words, characters, sentences and paragraphs, and see reading time and top keywords instantly.
Finance Calculators
Open category →Compound Interest Calculator
Work out how much a lump sum and regular monthly deposits will grow to, with any interest rate and compounding frequency.
Discount Calculator
Enter a price and a discount to get the sale price, how much you save and the real percentage off when two discounts are combined.
EMI Calculator
Find your equated monthly instalment (EMI) for any loan, plus the total interest and how each payment splits between interest and principal.
Loan Calculator
Find the regular payment on any fixed-rate loan and see exactly how much interest you will pay over its life.
Mortgage Calculator
Work out your monthly house payment, including principal, interest, property tax and insurance, and see how much interest you will pay over the life of the loan.
ROI Calculator
Measure how much an investment earned relative to its cost, and turn it into a yearly rate so investments of different lengths can be compared.
Salary to Hourly Calculator
Turn a salary into an hourly rate, or an hourly rate into a salary, and see your pay for every common pay period.
Sales Tax Calculator
Add sales tax to a price, or take it out of a total that already includes it, at any tax rate.
Simple Interest Calculator
Work out the interest on a loan or deposit that pays a fixed rate on the original amount only, with the I = P × r × t formula explained.
Tip Calculator
Enter the bill, pick a tip percentage and the number of people, and see the tip, the total and each person's share.
Health & Fitness Calculators
Open category →BMI Calculator
Work out your body mass index from your height and weight, see your category, and find the healthy weight range for your height.
BMR Calculator
Estimate how many calories your body burns at complete rest, using the three most widely used BMR formulas side by side.
Body Fat Calculator
Measure your neck, waist and (for women) hips to estimate body fat percentage, fat mass and lean mass.
Calorie Calculator
Estimate your daily calorie needs (TDEE) and get simple targets for keeping, losing or gaining weight.
Ideal Weight Calculator
See the healthy weight range for your height, plus the results of the four best-known ideal body weight formulas side by side.
Pregnancy Due Date Calculator
Work out an estimated due date and see how far along you are, with the dates each trimester begins.
Math Calculators
Open category →Unit Converters
Open category →Area Converter
Convert floor and land areas between square meters, square feet, acres, hectares and other units in one step.
Data Storage Converter
Convert between bits, bytes, kilobytes, megabytes, gigabytes and terabytes, in both decimal (GB) and binary (GiB) units.
Energy Converter
Convert energy units for food, electricity, heating and science, including kcal, kJ, kWh, joules and BTU.
Length Converter
Convert any length between metric and imperial units, from millimeters to miles, and see every unit side by side.
Pressure Converter
Convert pressure readings between PSI, bar, kilopascals, pascals, atmospheres and millimeters of mercury.
Speed Converter
Convert speeds between km/h, mph, m/s, knots and ft/s for driving, running, weather, flying and physics.
Temperature Converter
Convert any temperature between Celsius, Fahrenheit, Kelvin and Rankine, with the formulas and a handy reference chart.
Time Converter
Convert any length of time between milliseconds, seconds, minutes, hours, days, weeks, months and years.
Volume Converter
Convert liquid volumes between metric units, US customary units and UK gallons, from teaspoons to cubic meters.
Weight Converter
Convert between kilograms, pounds, ounces, grams, stone and tons, and see the same weight in every unit at once.
Generators
Open category →Password Generator
Create strong, truly random passwords with the options you need, and see exactly how hard each one would be to crack.
QR Code Generator
Turn a link, some text, Wi-Fi login details, an email address or a phone number into a QR code you can download and print.
Random Number Generator
Pick random whole or decimal numbers in any range, with options for no repeats and sorted results.
UUID Generator
Create universally unique identifiers (UUIDs, also called GUIDs) one at a time or in bulk, as version 4 or version 7.
Image & Color Tools
Open category →Date & Time Tools
Open category →Add Days to Date
Find the date that falls a given number of days, working days, weeks, months or years before or after any date.
Age Calculator
Enter a date of birth to get an exact age in years, months and days, plus the total in weeks and days and a countdown to the next birthday.
Date Difference Calculator
Find how many days, weeks, months and weekdays are between any two dates, with an option to count the end date as well.
Time Zone Converter
Pick a date, time and time zone to see the matching local time in cities around the world, including your own.