Random Number Generator
Generate one or more random numbers with range, precision, uniqueness, and reproducible seed controls.
Generate one or more random numbers with range, precision, and uniqueness controls.
1 to 100
5
whole numbers
About the random number generator
How this tool works
Random number generation is one of those tiny tasks that appears everywhere, from QA fixtures to quick decisions and classroom examples. This page keeps the controls focused on the settings people usually need instead of burying them in a one-off script.
The shared generator pattern also makes the output reproducible when you keep the same seed, which is useful for demos, screenshots, and testing workflows.
Where it is useful
Decimal precision and unique whole-number output cover both lightweight statistical needs and practical picker-style use cases.
Because the result is copy ready, it also fits naturally into spreadsheets, notes, tickets, or sample data flows.
- Generate quick picks, lottery-style values, or sample IDs during QA work.
- Create reproducible numeric fixtures for demos and screenshots.
- Produce decimal samples without opening a spreadsheet or terminal.
Example workflows
3 examples1 to 100, 5 values
Five whole numbers ready to copy
0 to 1, 3 decimals
Decimal output for sampling and demos
Unique values from 10 to 20
Non-repeating whole numbers
Common uses
3 ideas- Generate quick picks, lottery-style values, or sample IDs during QA work.
- Create reproducible numeric fixtures for demos and screenshots.
- Produce decimal samples without opening a spreadsheet or terminal.
FAQ
3 answersCan I reproduce the same random numbers later?
Yes. Keeping the same minimum, maximum, count, decimal places, and seed gives you the same result again.
Does the random number generator support unique values?
Yes, but uniqueness is limited to whole-number generation because decimal output can repeat in less predictable ways.
When should I use a browser-based random number generator?
It is useful for quick picks, QA scenarios, mock data, classroom examples, and any workflow that needs copy-ready random values.