Random Number
Generate cryptographically random numbers, roll dice, flip a coin, or pick lottery numbers.
Runs entirely in your browser — files never uploaded
Numbers come from crypto.getRandomValues — cryptographically secure, never Math.random. Rejection sampling ensures even distribution.
How to use Random Number
- 1. Pick a mode. Range, dice, coin flip, or lottery — each tuned for that use case.
- 2. Set parameters. Min/max, dice sides, flip count, lottery range.
- 3. Generate. Cryptographically secure results, generated in your browser.
FAQ
Is this truly random?
It uses crypto.getRandomValues — the browser's cryptographically secure random source. Suitable for games, contests, and most non-cryptographic uses. For high-stakes cryptography, use dedicated tools.
Why crypto random instead of Math.random?
Math.random is predictable and biased. Our generator avoids both with rejection sampling on top of secure random bytes.
Are my draws stored?
No — nothing leaves your browser. Refresh and they're gone.
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