Integers or arbitrary-precision decimals, multiple numbers and sets, exclusions, crypto-secure or seeded mode, dice/lottery presets, stats — all in your browser.
Loads common settings instantly — you can still tweak anything below before generating.
Your last 20 generations, saved only on this device. Click one to reload it.
10-20) that should never appear, even if they fall inside Min/Max.By default this tool uses the Web Crypto API, a cryptographically secure pseudo-random source suitable for games, giveaways, testing, and most everyday needs. A seeded mode is also available for reproducible, non-secure sequences.
Yes. Decimal digits are built as text rather than a floating-point number, so you can request a large number of decimal places without rounding errors or precision limits.
Yes. Set how many numbers per set and how many sets you want; each set can optionally be unique within itself or unique across all sets combined.
Yes. List individual numbers to exclude, or exclude one or more ranges (e.g. 10-20), and they will never appear in the output.
Entering a seed switches from the cryptographically secure generator to a reproducible pseudo-random generator — the same seed and settings always produce the same sequence, useful for testing or sharing a result.
No. Every number is generated locally in your browser. Nothing you enter or generate is sent to or stored on our servers; history is saved only in this browser's local storage.
Yes. Use the Quick Presets panel for common dice notations (e.g. 2d6), lottery-style unique picks, coin flips, PINs, and percentages.
Yes, for whole numbers. Choose Binary, Octal, or Hexadecimal in Output Formatting — this option is unavailable when generating decimals.
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