General tools
Everyday calculators, converters, timers, and randomizers - simple, single-purpose, and instant.
Date & time
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Age calculator
Work out an exact age in your browser - years, months, and days from a birthdate, days until the next birthday, and total days, weeks, and hours lived. Nothing leaves your machine.
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Due date calculator
Estimate a pregnancy due date in your browser from your last period, conception date, or IVF transfer, and see how far along you are today. Nothing leaves your machine.
Converter
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Roman numeral converter
Convert between Roman numerals and numbers in your browser - type either side and it translates live, from 1 to 3999, with validation. Nothing leaves your machine.
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Unit converter
Convert between units of length, weight, temperature, volume, area, speed, and digital storage in your browser - km to miles, C to F, kg to lb, and more. Nothing leaves your machine.
Randomizer
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Team randomizer
Shuffle a list of names into random teams in your browser - split by number of teams or by team size, with a cryptographically fair shuffle. Nothing leaves your machine.
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Wheel of names
Spin a wheel of names in your browser - type your list, give it a spin, and let a cryptographically fair draw pick a random winner. Nothing leaves your machine.
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Decision maker
Let chance decide in your browser - flip a coin, get a yes or no, or pick one of your own options at random. Nothing leaves your machine.
Timer
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Timer and stopwatch
A countdown timer and stopwatch in your browser - set a time and count down (it keeps counting once time is up), or count up with laps. Nothing leaves your machine.
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Pomodoro timer
A pomodoro focus timer in your browser - work and break cycles with adjustable, saved durations and a longer break every few rounds. Nothing leaves your machine.