Random Number Generator
Generate random numbers
Frequently Asked Questions
How do I generate a random number within a range?
Set the minimum and maximum values. The tool generates a uniformly random integer within that range (inclusive). Each number has equal probability. For example, 1-100 gives each number a 1% chance. Generate single numbers or batches.
Can I generate random decimal numbers?
Yes. Select decimal mode and specify the number of decimal places (1-10). Range 0.00-1.00 with 2 decimals gives 101 possible values. The tool supports both integer and floating-point random number generation.
How do I generate random numbers without repeats?
Enable "no duplicates" mode. The tool generates unique numbers from your range. For example, 5 unique numbers from 1-50 (like lottery picks). Maximum unique numbers equals the range size. Results are displayed in generation order or sorted.
Is the random number generator truly random?
The tool uses a cryptographically secure pseudo-random number generator (CSPRNG). While technically pseudo-random, it is indistinguishable from true randomness for all practical purposes. It passes all statistical randomness tests (NIST, Diehard).
What are common uses for random number generators?
Lottery and raffle drawings. Statistical sampling. Game mechanics (damage rolls, loot drops). A/B testing assignment. Randomized controlled trials. Shuffling playlists. Generating test data. Cryptographic key generation.