Random Number Generator
Generate random numbers with min/max range, quantity, and options. 100% client-side.
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What is this tool?
Random number generator produces random numbers within a specified range. It supports integer and decimal random numbers, with options for minimum/maximum bounds and quantity. Uses cryptographically secure random generation. Useful for lotteries, game development, sampling, randomization, and decision making.
How to use
- 1
Set range
Input the minimum and maximum values.
- 2
Set quantity
Choose how many random numbers to generate.
- 3
Generate
Click to generate random numbers.
Frequently Asked Questions
Are these truly random numbers?
This tool uses the browser's crypto.getRandomValues() API which provides cryptographically secure pseudo-random numbers. They are statistically random and suitable for most purposes. True randomness requires physical entropy sources like atmospheric noise.
Can I get the same number twice?
Yes, unless you disable duplicates. When generating multiple random numbers from a small range, duplicates are statistically likely. The probability of a duplicate in N draws from a range of R values is approximately 1 - e^(-N²/(2R)).
Are the numbers truly random?
The tool uses JavaScript pseudo-random numbers. For crypto use crypto.getRandomValues.
What is a random number generator?
A random number generator (RNG) produces a sequence of numbers with no predictable pattern, which makes it useful for lotteries, sampling, simulations, and testing. True random numbers come from physical noise; computer generators are usually pseudo-random, meaning a formula produces the sequence from a starting seed. That is fast and repeatable but not cryptographically secure. This tool covers integer ranges between a minimum and a maximum: fine for games and testing, while cryptographic uses should switch to crypto.getRandomValues.