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Generate random numbers in any range, with optional uniqueness.
This tool generates random numbers within any range you specify. Use it for picking lottery numbers, selecting contest winners, choosing a random student, running simulations, or any time you need an unbiased random selection.
This generator uses JavaScript's built-in pseudo-random number generator (PRNG), which produces numbers uniformly distributed across your chosen range. The "unique numbers" option ensures no repeats — useful for raffles and sampling without replacement.
Most software (including this tool) uses pseudo-randomnumbers, generated by mathematical algorithms. These are sufficient for games, simulations, and everyday use, but predictable in principle. For cryptography or high-stakes lotteries, "true" random numbers from physical sources (radioactive decay, atmospheric noise) are needed — see Random.org for that.
The Random Number Generator creates random number generator on demand, right in your browser. Set the options you need, click generate, and the result is ready to copy. Because everything runs locally, nothing you enter or produce leaves your device.
Generators like this are useful when you need a specific output (a password, a UUID, a QR code, placeholder text) and don't want to install an app or trust an unknown website with your data. This tool is free, has no usage limits, and works the same on phone and desktop.
Common uses: people reach for this tool when they need to use a random number generator in range, pick unique random numbers, random number no repeats, or generate many random numbers.
Browser-based tools like this one have a few real advantages over installed software or manual methods:
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