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Three randomness tools in one: generate random numbers in a range (with optional no-repeat), pick one or more winners from a pasted list, and split a list into balanced random teams. Uses your browser's cryptographic random source — fair, not pseudo-random.
Teachers use it to call on students and form groups; developers for test data; event hosts for giveaways. Everything runs locally, so participant lists never leave the device.
It uses the browser's cryptographic random source (crypto.getRandomValues) — the same quality of randomness used for security purposes, far better than typical Math.random() pseudo-randomness.
Yes — enable it and each generated number is unique, like drawing numbered balls from a hat. The tool prevents asking for more unique numbers than the range contains.
Names are shuffled first, then dealt round-robin into teams. With uneven counts, earlier teams get one extra member. Every person appears exactly once.
PureKit · random-generator · Free online tool — files processed locally in your browser, no upload.