Random Generators

Generate cryptographically random integers, decimals, strings, hex, bytes, UUIDs, IP addresses, MAC addresses, dates, prime numbers, and more — all client-side using crypto.getRandomValues(). Also flip a coin or roll dice (with hold/reroll for Yahtzee-style play).

Min:

Max:

Count:

Unique

Distribution:

Output

Random Generators

Common uses

Generate 10 unique random integers
Pick a random winner from a list
Generate a random MAC address
Generate random UUIDs
Flip a coin
Roll 3d20

Also searched as

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Frequently asked questions

Is this random number generator cryptographically secure?

Yes. Values come from the browser's crypto.getRandomValues(), not Math.random.

How do I pick a random winner from a list?

Use the Name Picker tab: paste one name per line and it draws at random.

Can I roll multiple dice like 3d20?

Yes. The Dice Roller lets you pick a die type (d4, d6, d8, d10, d12, d20 or d100) and roll up to 20 of them at once, so 3d20 works. You can also hold dice and reroll the rest for Yahtzee-style play.

Can I generate unique random integers without repeats?

Yes. The Number tab's integer mode can produce multiple values in a range, with a Unique toggle that avoids repeats when using the uniform distribution.

Is my data uploaded to a server?

No. This tool runs entirely in your browser — your input is processed locally on your device and is never uploaded or stored on a server.