random number generator

Generate random numbers.

Pick a range and how many you need. Use a seed for reproducible output, or leave it blank for cryptographically random results.

AIExplain randomness

Frequently asked

Is this tool free?
Yes. The random number generator is completely free. Generate up to 1000 numbers at a time.
Do I need to sign up?
No. Set a range, click generate, and copy the results. No account needed.
Is my data private?
All generation happens in your browser. When no seed is set, numbers come from the cryptographically secure Web Crypto API. No data is sent to any server.
What does the seed option do?
Entering a seed switches to a deterministic algorithm (mulberry32) so the same seed always produces the same sequence. This is useful for reproducible simulations or testing. Leave the seed blank for cryptographically secure randomness.