Random Number Generator
Generate random numbers within a range. Single or multiple numbers, with or without duplicates.
Frequently Asked Questions
Are these truly random numbers?+
These use JavaScript's Math.random(), which is a pseudo-random number generator (PRNG). It's suitable for games, simulations, and general use. For cryptographic purposes, use our Password Generator which uses the Web Crypto API.
Can I generate unique numbers?+
Yes! Uncheck 'Allow Duplicates' to generate unique numbers. This uses Fisher-Yates shuffle for unbiased selection. The count is limited to the range size when duplicates are disabled.
What is the maximum range?+
JavaScript safely handles integers up to 9,007,199,254,740,991. For practical purposes, any range within ±1 billion works perfectly.