Last updated: July 2026
How to Use the Random Number Generator
Our random number generator is designed to be the fastest and most flexible tool for picking numbers online. Whether you're running a sweepstakes in the US, conducting statistical sampling, or just trying to decide who goes first in a board game, you can get a result in seconds.
Features and Settings
- Custom Ranges: By default, the generator picks a number between 1 and 100. However, you can easily change this to simulate a coin flip (1 to 2), a standard die roll (1 to 6), or a massive lottery draw (1 to 1,000,000).
- Batch Generation: Need to pick 5 winners for a contest? Change the "How many numbers?" field to 5. The tool will instantly generate a clean, comma-separated list of results.
- Duplicate Control: The "Allow Duplicates" toggle gives you complete control over the probability. If you are drawing names from a hat where a person can only win once, turn this off. If you are simulating multiple independent dice rolls, leave it on.
Fairness and Probability
When running online giveaways or promotions, fairness is critical. This tool uses the Web Crypto API with rejection sampling to guarantee an equal probability distribution — if you generate a number between 1 and 10, the number 7 has the exact same mathematical likelihood of being chosen as the number 2. The results are calculated entirely client-side in your browser, meaning there is zero server manipulation or bias in the outcomes.
Frequently Asked Questions
Yes. It uses the Web Crypto API's cryptographically secure random number generator (not the weaker Math.random() many online tools rely on), with rejection sampling to ensure every number in your range has exactly equal probability.
Yes! Simply set the Minimum to 1 and the Maximum to 10, then click generate. You can set the range to absolutely any two numbers.
Uncheck the 'Allow Duplicates' box. This ensures that every number generated in your batch is entirely unique. Note that you cannot generate more unique numbers than your chosen range allows.
Common uses include picking a random winner for social media giveaways, selecting students in a classroom, generating lottery numbers, rolling virtual dice, or breaking ties in games.
You can generate up to 100 random numbers simultaneously in a single batch to ensure fast performance and readability.
Yes. Because it uses a cryptographically secure random source with no modulo bias, every eligible number has an equal, verifiable chance of being picked, which holds up to scrutiny for public giveaways or drawings.
You can use it to generate numbers within your lottery's range, but remember this only picks random numbers — it doesn't check them against your specific lottery's official drawing rules or number pools (e.g. separate main and bonus number ranges).