Settings
MiscHow the random number generator works
This tool uses the browser's Web Crypto API — the same mechanism used for cryptographic operations, which provides high-quality randomness, far superior to simple pseudo-random algorithms.
The "no repeats" option
When uniqueness is enabled, every generated number in the result set will differ from the others — useful for giveaways where each participant needs a distinct number, or for randomly selecting several unique items from a list.
Practical uses
- Giveaways and raffles: selecting a winner among participants by number.
- Games and board games: replacing dice or cards for random events.
- Research and statistics: random sampling from a population for surveys.
- Software testing: generating test data to verify functionality.
For informal use (games, giveaways among friends) this generator works great. For official lotteries with cash prizes, specialized certified systems with independent auditing are used.
FAQ
How random are these numbers?
The generator uses the browser's cryptographically secure randomness source (Web Crypto API), which provides high-quality randomness.
Can I get numbers without repeats?
Yes, enable the "no repeats" option — then every number in the result set will be unique.
Is this generator suitable for lotteries or giveaways?
Yes, for informal giveaways and personal use. Official lotteries with cash prizes use certified systems.