Are browser-generated random numbers truly random?

Browser Math.random() uses a pseudorandom algorithm that is statistically random enough for games, sampling, and everyday use. For cryptographic purposes, the Web Crypto API provides stronger randomness.

Can I generate unique (non-repeating) numbers?

Yes. Enable the 'Unique only' option to ensure no number appears more than once. Note that the count cannot exceed the range size when unique mode is active.

Is there a limit to the range?

The tool supports ranges up to several billion. JavaScript handles integers safely up to 2^53 - 1 (about 9 quadrillion).

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Random Number Generator

Generate random numbers within any range with options for count, uniqueness, and sorting. Free online tool — no signup required.

Quick Answer

To generate random numbers, set the minimum and maximum range, choose how many to generate, and click Generate.

Minimum

Maximum

Count

Unique onlySort ascending

How to Use the Random Number Generator

Use the input area to provide your data.
The tool processes it instantly in your browser.
Copy or download the result.

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Frequently Asked Questions

Are browser-generated random numbers truly random?: Browser Math.random() uses a pseudorandom algorithm that is statistically random enough for games, sampling, and everyday use. For cryptographic purposes, the Web Crypto API provides stronger randomness.
Can I generate unique (non-repeating) numbers?: Yes. Enable the 'Unique only' option to ensure no number appears more than once. Note that the count cannot exceed the range size when unique mode is active.
Is there a limit to the range?: The tool supports ranges up to several billion. JavaScript handles integers safely up to 2^53 - 1 (about 9 quadrillion).

What is a Random Number Generator?

A random number generator (RNG) produces numbers that lack any predictable pattern. Browser-based generators use pseudorandom algorithms (Math.random or the Web Crypto API) to produce statistically random results suitable for games, sampling, decision-making, and educational purposes.