Random Number Generator
Draws random whole numbers in a range, with or without repeats, from a seed you can publish.
Results
What this tool does
Most random number pages give you a number and nothing else, which is fine until somebody asks how they know it was fair. This one draws from a seed: publish the seed first and the draw can be repeated by anyone, at any time, and it will come out the same. The generator is a small, well-known algorithm, identical here and in the checks that verify this site — it is for raffles, sampling and games, not for anything that needs cryptographic randomness.
Formula
seeded draw: the same seed always gives the same numbers
Variables
| Symbol | Meaning | Unit |
|---|---|---|
low | Minimum value | — |
high | Maximum value | — |
count | How many | — |
unique | Repeats | — |
seed | Seed | — |
OUT | Numbers drawn | — |
F1 | First number | — |
TT | Sum | — |
MN | Mean (average) | — |
Worked example
- Minimum value1
- Maximum value100
- How many6
- Repeats0
- Seed2026
- Numbers drawn46 31 67 62 16 23
- First number46
- Sum245
- Mean (average)40.8333
Limitations
- The calculation runs entirely in your browser. The values you type are never sent to a server.
Frequently asked questions
What is the seed for?
It makes a draw repeatable. The same seed always produces exactly the same numbers, so you can announce the seed before a raffle and anyone can come back afterwards, enter it here, and confirm that the result was not chosen after the fact. Press Again and a fresh seed is drawn for you.