Random Number Generator
Generates random integers or decimals within a range, optionally unique.
Input
Output
Enter values to see the result.
Runs entirely in your browser. Your input is not uploaded or stored.
How to use this calculator
- Set the min, max, how many, decimal places and whether duplicates are allowed.
- Click Generate.
How it works
Generates uniform random numbers in your range using the browser's Math.random — all client-side.
Worked example
Dice rolls. Min 1, max 6, count 5, no duplicates → five different 1–6 values.
Tips
- Runs entirely in your browser. Your input is not uploaded or stored.
Frequently asked questions
Is it cryptographically secure?
No — it's for general use (picks, sampling, testing), not security tokens.
Privacy?
Runs entirely in your browser. Your input is not uploaded or stored.
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Cite this tool
Zerdly. (2026). Random Number Generator. Retrieved from https://www.zerdly.com/tools/random-number-generator/
Tip: Enter any known values to calculate the remaining results.
All calculations run in your browser. Your inputs are never saved or transmitted.