Generate single or multiple random numbers within a custom range. Unique number mode ensures no repeats. Uses cryptographic randomness.
Open Random Number Generator → free, no sign-inNeed a random number? The Random Number Generator lets you define a min and max range, generate one or many numbers at once, and optionally enforce uniqueness across the set. Uses the browser's cryptographic random number generator for genuinely unbiased results.
Games, lotteries, statistical sampling, simulations, random selection from a list — any situation where you need one or more random numbers within a defined range.
No tutorials. No learning curve. Open it and get started.
No server uploads. Uniqueness mode ensures no duplicates in a generated set — useful for lottery-style selection.
Completely free. No trial period. No premium tier for basic functionality. No account required. Use it as often as you need.
One job, done well. Random Number Generator was built to solve a specific problem cleanly. No feature bloat, no ads, no distractions.
Is the randomness truly random?
Uses window.crypto.getRandomValues() for cryptographically strong randomness.
What is unique mode?
Ensures all generated numbers are different — like drawing without replacement.
Can I use this for lottery number selection?
Yes — set your range (e.g. 1–59) and quantity, and enable unique mode.
What is the maximum range?
Any integer range is supported.
Can I generate decimal numbers?
The tool generates integers. For decimals, divide the output by a power of ten.
Free. Instant. No sign-in. Open it and get the job done.
Open Random Number Generator on Doathingy.com →