What “random” means here
The page uses ordinary runtime randomness suitable for a classroom or a casual pick. It is not designed to resist prediction or to satisfy a gaming-commission draw.
Your numbers
Random numbers
Generate numbers in a range. Ordinary utility randomness, not a security tool.Guide
Ordinary utility randomness
One or more numbers in a range, optionally unique integers. This is not a cryptographic generator, not a lottery draw, and not a way to pick passwords or raffle winners that must be auditable.
Questions about this calculator
Can I use this to pick a raffle winner?
You can, but you should not treat it as a certified drawing. Use a process your group agrees is fair.
Terms used here
- Unique integers
- Sampling without replacement inside the range, until the range is exhausted.
Practical tips
- For a password or a secret, use a password manager, not this page.
Limits and caveats
- Generated numbers, not a calculation of a real-world quantity. Not for security keys or lotteries.
Results are for information. They are not legal, tax, medical, or financial advice. How the math is maintained · Report a wrong figure.
Engine notes
Rounding, versioning, and omissions that sit beside the guide rather than repeating it.
- When you click Generate. Numbers come from the browser’s secure random source when it is available. That is good randomness, but this tool is not certified for regulated draws.
- Integers and uniques. Integer mode includes both ends of the range. Unique mode cannot ask for more numbers than the range contains.
- Decimals. Decimal draws are from the half-open interval [min, max). Unique decimals are not offered.