Units & Numbers Tools
Random Number Generator
Generate random numbers in any range, including unique sets.
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What is Random Numbers?
A random number generator for games, sampling, and giveaways. Choose a range, count, and whether repeats are allowed.
How it works
Numbers come from a seeded, repeatable PRNG (or crypto.getRandomValues when requested) with rejection sampling for the no-duplicates mode.
- Enter your input. Type or paste your input into the field above — the tool responds instantly.
- Review the result. Output updates live as you type. Everything runs entirely in your browser.
- Copy or download. Use the Copy button to grab the result, or Download to save it as a file.
Examples
Realistic sample
Paste or type any realistic input — the tool computes the result locally and instantly.
Common mistakes
Expecting a server round-trip
Nothing is uploaded — every tool in this category runs entirely in your browser.