Random Number Generator
Generate random numbers between any range. Supports batch generation and unique numbers.
Files processed in your browser — never uploaded to our serversWhat is Random Number Generator?
A random number generator produces unpredictable numbers within a range you define — useful for raffles, statistical sampling, research, gaming, and teaching probability. There is an important distinction between pseudorandom (algorithmic, deterministic with a seed) and cryptographically random (uses system entropy, suitable for security). This tool uses the browser's crypto.getRandomValues() for true randomness — not the weaker Math.random(). Use cases include picking lottery numbers, assigning random IDs, generating test data, and selecting students or participants in classroom settings.
How to use
- Set the minimum value for your range.
- Set the maximum value for your range.
- Choose how many numbers to generate.
- Click Generate and read the results instantly.
Why it matters
Humans are terrible at generating random numbers manually — we unconsciously avoid sequences, prefer certain digits, and show repeating patterns. A random number generator eliminates this bias completely. For raffles and contests, using a verifiable random number generator adds credibility and fairness, and the result can be shared or screenshotted to prove the selection was not manipulated.
Pro tip
For a raffle with 500 entries, generate one number between 1 and 500 and assign it to the winner's position in your list. For multiple winners, generate numbers without repetition — use the unique numbers option. Screenshot the result before announcing to prove the draw was fair and untampered.