Meet the Random Number Generator
Generate random numbers in any range, with or without repeats. Roll dice, flip a coin and pick lottery-style numbers.
- Free to use
- No signup
- Nothing to install
- Runs in your browser
Illustration. Open the tool for the real thing.
What is the Random Number Generator?
Need a fair, unbiased random number? Set a minimum and maximum, choose how many numbers you want and whether repeats are allowed, and generate them with your browser's secure random generator.
The same page includes a dice roller (any number of dice with 4 to 20 sides) and a coin flip, so it works for games, raffles, classroom activities, giveaways and decisions.
3 steps to your result
Open the tool and follow along. Nothing to install.
What you get
From negative numbers to millions.
Pick unique numbers, like a lottery draw.
Roll d4 to d20 and flip a coin.
Uses the Web Crypto API.
AZRS tools are free to open and use.
It opens in your browser, so there is nothing to download.
Used for
Pick one to see how it fits.
How it compares
A plain look at this tool next to the usual alternative.
| This calculator | Desktop software | |
|---|---|---|
| Install | Nothing to install | Usually an app or program to install |
| Account | No signup | Depends on the product |
| Cost | Free to use | Free or paid, depends on the product |
| Where it runs | In your browser tab | On your computer |
Questions people ask
Is this truly random?
It uses the browser's cryptographic random generator, which is suitable for fair draws.
Can I get numbers without duplicates?
Yes. Turn on unique numbers and the generator will not repeat any.
How do I pick lottery numbers?
Set the range (for example 1 to 49), choose how many, and enable unique numbers.
Can I roll several dice?
Yes. Choose the number of dice and sides and see each roll and the total.
Is this truly random?
It uses your browser’s cryptographic random source, which is suitable for fair draws.
More free tools
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Try the Random Number Generator now
Random numbers, dice rolls and coin flips. Free to use.
Try it free