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Randomizers

Shuffle lists, flip coins, roll dice, and generate random numbers. Cryptographic randomness via the Web Crypto API.

6 tools available

Randomness is surprisingly useful — picking a winner, shuffling a playlist, generating a passphrase, simulating dice rolls, or just making a decision when you can't choose. These tools use cryptographic randomness (via the Web Crypto API) to ensure fair, unpredictable results. Whether you need a coin flip, a random number in a range, or a shuffled list, the result is instant and verifiable. Nothing is stored or transmitted.

The most frequently used tools are the Random Number Generator and the List Randomizer. The Number Generator produces integers or decimals within a specified range with configurable inclusive/exclusive bounds — useful for lotteries, sampling, simulation, or settling disputes. The List Randomizer accepts a pasted list of items (names, tasks, options) and shuffles them into a random order, which is handy for drawing raffle winners, assigning rotating responsibilities, or randomising survey response order.

The Dice Roller simulates 1-10 dice with configurable sides (d4, d6, d8, d10, d12, d20, d100) and supports advantage/disadvantage mechanics used in tabletop RPGs. The Coin Flipper produces fair heads/tails results with visual feedback — simple but useful for binary decisions.

The Alphabet Randomizer produces a shuffled alphabet, which is useful for creating substitution ciphers, generating unique colour assignments, or randomising test conditions in experimental design. The Date Randomizer generates random dates within a specified range, useful for testing date-handling code or creating sample datasets.

How to choose the right tool

For decisions, the Random Number Generator and Coin Flipper handle quick binary or ranged choices. Both use cryptographic randomness for fairness.

For lists and sets, the List Randomizer shuffles any pasted list. The Dice Roller supports tabletop RPG dice (d4 through d20) with advantage/disadvantage mechanics.