All tools
Every tool on this site is free, runs in your browser, and needs no sign-up.
Time & Date
Timer
Free countdown timer, right in your browser.
Stopwatch
A simple stopwatch with lap timing, right in your browser.
Age Calculator
Find your exact age in years, months, days, and more.
Date Calculator
Find the number of days between two dates, or add/subtract days.
Countdown Timer
Count down the days, hours, minutes, and seconds to any date.
World Clock
See the current time in major cities around the world, live.
Text & Writing
Word Counter
Count words, characters, sentences, and paragraphs instantly.
Character Counter
Count characters with and without spaces, live as you type.
Case Converter
Convert text to UPPERCASE, lowercase, Title Case, and more.
Palindrome Checker
Check if a word or phrase reads the same forwards and backwards.
Slug Generator
Turn any text into a clean, URL-friendly slug.
Math & Calculators
Percentage Calculator
Calculate percentages, percentage change, and percentage of a number.
BMI Calculator
Calculate your Body Mass Index in metric or imperial units.
Tip Calculator
Calculate tip amount and split the bill between people.
Discount Calculator
Find the sale price and how much you save on a discount.
Average Calculator
Find the mean, median, mode, and range of a list of numbers.
Loan Calculator
Estimate your monthly payment, total interest, and total cost.
GPA Calculator
Calculate your grade point average from letter grades and credits.
Converters
Unit Converter
Convert length, weight, and temperature units instantly.
Color Converter
Convert colors between HEX, RGB, and HSL formats.
Roman Numeral Converter
Convert between numbers and Roman numerals, both directions.
Number Base Converter
Convert numbers between binary, octal, decimal, and hexadecimal.
Random & Generators
Random Number Generator
Generate random numbers within any range you choose.
Password Generator
Generate strong, random passwords with custom character rules.
Dice Roller
Roll one or more virtual dice with any number of sides.
UUID Generator
Generate random version 4 UUIDs (GUIDs) for testing and development.