Random Number Generator Online

Sometimes you just need a number that nobody can predict or influence — for a raffle pick, a game, a statistical sample, or a test case. This tool generates random numbers within any range you set.

How it works

The generator uses JavaScript's Math.random() function, which produces a cryptographically pseudo-random floating-point value between 0 and 1, then scales and floors it to fit your specified min/max range. Everything runs in your browser — no server involved.

How to use it

1. Set your minimum and maximum values
2. Choose how many numbers to generate (single or multiple)
3. Optionally enable no duplicates if you need a set of unique values
4. Click Generate — results appear instantly

A few things worth knowing

• Not cryptographically secure: Math.random() is suitable for games, simulations, and sampling — but not for generating passwords, cryptographic keys, or tokens. For those, use the Password Generator which uses crypto.getRandomValues()
• Uniform distribution: Each number in your range has an equal probability of being selected — there's no weighting or bias
• Floating-point option: If you need decimal values rather than integers, toggle the decimal output option

FAQ

Is this truly random? It's pseudo-random — generated by a deterministic algorithm seeded from system entropy. For practical purposes like raffles, games, and sampling it's indistinguishable from true random. For cryptographic use, it's not sufficient.

Can I generate numbers with a specific distribution (normal, Poisson, etc.)? This tool generates uniformly distributed integers or decimals. For other distributions you'd need a statistical computing environment.

Can the same number appear twice? By default, yes — each pick is independent. Enable the "no duplicates" option to generate a set of unique values within your range.

Related Tools

• Password Generator
• UUID Generator