Random Number Generator
Crypto-secure · 100% offline
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Result
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Statistics
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Draws this session
Truly random, not pseudo
Uses crypto.getRandomValues() — the same source as browser TLS keys — with rejection sampling to remove modulo bias. Unlike Math.random(), it can't be reproduced or predicted.
Related tools
Real randomness matters
- Online contests: pick winners fairly — anyone can audit crypto.getRandomValues is unbiased.
- Board games: missing your D20? D4 to D20 all work offline.
- Lottery-style picks: true uniform sampling over the full space.
- Decision paralysis: flip a coin when both choices are equal — the instant it lands, you'll know which you hoped for.
A note on lottery: every combination is equally likely — no tool predicts winning numbers. If any site claims to, close the tab.