Random Number & UUID Generator
Generate random integers, decimals, pick from a list, or create cryptographically random UUIDs — all in your browser.
Frequently Asked Questions
The Random Number tab uses Math.random(), which is statistically sufficient for games, lotteries, and simulations. The UUID Generator uses crypto.getRandomValues() — a cryptographically secure source — for maximum randomness quality.
Paste any list of items separated by commas or by newlines. Set how many items to pick, then click "Pick Random Items." Perfect for choosing a random winner from a list of names.
UUID version 4 is a 128-bit identifier generated from random numbers. It has 122 bits of randomness making collisions astronomically unlikely. It's the most common UUID type used in applications and databases as a unique primary key.
Yes. Uncheck "Allow duplicates" and each generated number will be unique. Note that the range must contain enough distinct integers to satisfy the requested count.