Random Generators and Utilities
Fair, unbiased random results for games, decisions and draws, plus a timer you can embed on your site.
- Random Number GeneratorAny range, many numbers, repeats optional.
- Random Choice WheelSpin a wheel of your own options.
- Coin FlipHeads or tails, with running totals.
- Dice RollerRoll d4 to d100, up to 10 dice at once.
- Rock Paper ScissorsPlay against a fair random opponent.
- Embeddable TimerConfigure a timer and copy iframe code.
- Chess ClockTwo-player clock with configurable increment.
- Contraction TimerTimes and logs contractions.
- Multiple TimersSeveral independent countdowns at once.
- Random TimerRolls a random duration, then counts down.
- Ticking TimerA countdown that ticks audibly near the end.
- Timer in a TabShows the countdown in the browser tab title.
- Bomb TimerA dramatic, high-contrast countdown display.
- No Contact TimerTracks days since a chosen start date.
How the randomness works
Results come from your browser's cryptographic random number generator (the Web Crypto API) with rejection sampling, which avoids the small bias that simple methods introduce. Every outcome in a range is equally likely.