Random Number Generator
Generate random numbers in any range — with optional no-repeat picks.
About the Random Number Generator
From drawing a raffle winner to picking lottery-style numbers or seeding a game, a fair random number is surprisingly handy. The AlarmDaddy Random Number Generator produces numbers in any range you set, one at a time or in batches, with an option for unique (no-repeat) results.
It uses the browser's cryptographically secure random source, so the numbers are genuinely unpredictable — not the weak, patterned output of basic generators.
How to use this calculator
- 1Set the minimum and maximum.
- 2Choose how many numbers to generate.
- 3Optionally tick "No repeats" for unique values.
- 4Click Generate and copy the results.
The formula
Rather than the predictable Math.random, the tool draws from the Web Crypto secure random generator and uses rejection sampling to avoid modulo bias, so every number in your range is equally likely. The "no repeats" option shuffles the full range and takes the first N values.