Random Number Generator
Integer
Decimal
5
Uniform
Normal (bell curve)
How to Use
- Set the minimum and maximum values for the range.
- Choose "Integer" or "Decimal" and set decimal places if needed.
- Set how many numbers to generate (1–1000).
- Choose "Uniform" (every value equally likely) or "Normal" (values cluster around the middle, bell-curve distribution).
- Enable "Unique values only" to avoid repeats (only available for integers, when the range is large enough).
- Click Generate — copy individual values or all at once.
Frequently Asked Questions
QWhat is the difference between uniform and normal distribution?
Uniform distribution means every number in the range has an equal chance of being picked — like rolling a fair die. Normal (Gaussian) distribution means numbers near the middle of the range are more likely, and numbers near the edges are rarer — like the classic bell curve.
QHow does "unique values only" work?
When enabled, each generated number is guaranteed to be different from the others — useful for things like lottery numbers or random sampling without replacement. This option requires the range to contain at least as many values as you want to generate.
QIs this suitable for cryptography or security?
No — this tool uses JavaScript's standard random number generator, which is suitable for games, sampling, and general-purpose randomness, but not for generating cryptographic keys, passwords, or security tokens. Use the Password Generator for that.
QCan I generate decimal numbers?
Yes — switch to "Decimal" mode and set how many decimal places you want (0–10).
QIs my data sent to a server?
No. All numbers are generated locally in your browser using JavaScript. Nothing is sent to or stored on any server.
About This Tool
Uniform random numbers use JavaScript's Math.random(). Normal distribution uses the Box-Muller transform to convert uniform random values into a Gaussian distribution centered on the midpoint of your range, then clamps results to stay within the range.
