Random Number Generator
Free random number generator. Pick random integers in any range, with unique or repeatable options. Instant, no signup.
What is a random number generator?
A random number generator produces random integers within a range you set — handy for lottery-style picks, classroom draws, game rolls, and sampling. You choose the range, how many numbers, and whether repeats are allowed.
How this generator works
- Set a minimum and maximum, then how many numbers you want.
- Choose unique numbers or allow repeats — useful for raffle-style draws.
- Unique mode shuffles the full range and picks without replacement.
- Results are shown together in one readout for easy copying.
How to use the result
- Use unique mode for draws and sampling where each item can be picked once.
- Use repeats-allowed for dice rolls and lottery simulation, where outcomes repeat.
- If the range is large and you need few numbers, either mode works — repeats just become unlikely.
- For anything security-related, use a cryptographically secure generator, not this one.
Can you generate truly random numbers?
No algorithm is truly random — every software generator uses a deterministic seed, including this one. For most uses (games, draws, education) that’s fine. For cryptography, lotteries, or anything with money at stake, use a hardware-based or CSPRNG source.
Common mistakes
- Requesting more unique numbers than the range holds. The generator clamps the count to the range size.
- Using PRNG for security. Lotto-like “random” passwords need cryptographic randomness.
- Assuming no repeats means evenly spaced. Unique just means no duplicates — clusters still happen.
Random picks are simple arithmetic at heart — the average median mode calculator can summarise a batch of random results, and the standard deviation calculator shows how spread out they are.