Random Number Generator
Cryptographic random integers and decimals.
Ctrl+Enter runs. Ctrl+Shift+Backspace clears.
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Draws from the browser CSPRNG with rejection sampling so the range is not biased. Unique draws are refused when the range is too small.
About this tool
Pick a minimum and maximum and draw one or many random numbers. Values come from the browser's cryptographic generator with rejection sampling, so every number in the range is equally likely.
How to use it
- 01
Set the minimum and maximum of the range.
- 02
Choose how many numbers and how many decimals you need.
- 03
Turn on Unique to avoid repeats and generate.
Frequently asked questions
Are the numbers truly random?
They come from the browser's cryptographically secure generator, and rejection sampling removes bias toward any part of the range.
Can I draw numbers without repeats?
Yes. Turn on Unique. If the range is too small for the count you asked for, the tool tells you instead of repeating.