About Random Nr

How randomness works here

Every tool draws from the Web Crypto random source your browser provides, which is seeded by the operating system from real world entropy. Values are mapped into your chosen range with rejection sampling, so no number is slightly more likely than another because of rounding.

That is a pseudo random generator with a strong seed rather than a hardware device reading atmospheric noise. For draws, games, sampling and teaching it behaves the way a fair physical device would. If you need repeatable output instead, the seeded generator gives the same sequence for the same seed.

Design principles

• The tool comes first, above the fold, working on the first load
• Plain HTML pages that load fast on any connection
• One page per job so each has a clear title, purpose and result
• Explanations below the tool, never in front of it
• Every result copyable and downloadable as CSV

Privacy

Nothing you type is sent to a server. Ranges, lists and results stay on your device, which also means the tools keep working if your connection drops after the page has loaded.

Contact

Suggestions for a generator that is missing are welcome. Add a contact address here before launch.

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