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    Calculators

    Random Number Generator

    Generate random numbers within any range — single or batch, with optional uniqueness.

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    Set a range and click generate to see random numbers here.

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    About Random Number Generator

    The Automarkly Random Number Generator is a free, fast and reliable online tool that produces random integers within a range you define. Whether you need a single random number for a decision, a batch of numbers for a statistical sample, a lottery-style draw, a classroom activity, or a game, this generator handles it all with a clean, distraction-free interface. Simply set the minimum and maximum values, choose how many numbers you want, and optionally enforce uniqueness — the tool does the rest instantly.

    Random number generation has countless practical applications. Teachers use it to call on students fairly or to assign random groups. Researchers and statisticians use it to draw unbiased samples. Developers use it for testing and prototyping. Event organizers use it for raffles and giveaways. Board game enthusiasts and tabletop gamers use it as an impartial die or number picker. Whatever your use case, the ability to generate multiple numbers at once — with or without duplicates — makes this tool far more flexible than a basic random picker.

    Our generator uses JavaScript's built-in Math.random function, which produces pseudo-random numbers suitable for everyday applications, simulations, and games. For the unique-number mode, we use a Fisher-Yates shuffle to guarantee that every number in the result set is distinct — perfect for lottery draws or any scenario where repeats are not allowed. The interface updates instantly, and you can regenerate results with a single click as many times as you need.

    Privacy and simplicity are at the heart of Automarkly. There are no accounts, no tracking of your generated values, and no server-side processing. Everything runs in your browser, so you can use the tool even without an internet connection once the page has loaded. It is fully responsive and works equally well on a phone, tablet, or desktop computer.

    How to Use Random Number Generator

    1

    Enter the minimum value of your desired range.

    2

    Enter the maximum value of your desired range.

    3

    Specify how many random numbers to generate.

    4

    Toggle 'Unique only' if you need no duplicate values.

    5

    Click Generate and copy the results if needed.

    Key Benefits

    Generate a single number or a batch of up to thousands.
    Optional unique mode prevents duplicate numbers using Fisher-Yates shuffle.
    Customizable minimum and maximum range.
    One-click copy of all generated numbers.
    100% client-side — no data sent to any server.
    Works offline once loaded, on any device.

    Frequently Asked Questions

    How random are the numbers generated?

    We use JavaScript's Math.random, which produces high-quality pseudo-random numbers suitable for everyday use, games, sampling, and simulations. For cryptographic security, a dedicated CSPRNG tool would be more appropriate.

    What is the 'Unique only' option?

    When enabled, the generator ensures every number in the result set is distinct. It uses a Fisher-Yates shuffle so there are no repeats — ideal for raffles, lotteries, or assigning unique IDs.

    Is there a limit to how many numbers I can generate?

    You can generate thousands of numbers at once. For the unique mode, the maximum is limited by the size of your range (max − min + 1).

    Can I generate decimal numbers?

    This tool generates integers. If you need decimal random numbers, you can generate integers and divide by a factor, or use a dedicated floating-point generator.

    Are my generated numbers stored?

    No. All generation happens in your browser. The numbers are never transmitted to or stored on any server.

    Tips & Best Practices

    Use the 'Unique only' option for raffles, lottery draws, or assigning distinct IDs to prevent duplicates.
    For a fair dice roll simulation, set min to 1, max to 6, and generate 1 number.
    To simulate a coin flip, set min to 0 and max to 1 — 0 is tails, 1 is heads.
    For statistical sampling, generate as many unique numbers as your sample size requires within your population range.
    The generator uses Math.random which is pseudo-random — suitable for games and simulations but not cryptographic security.
    Click Generate repeatedly to get new results — each click produces a fresh independent set of numbers.

    Conclusion

    The Random Number Generator produces random integers within any range you define, with support for batch generation and optional uniqueness using a Fisher-Yates shuffle. Whether you're running a raffle, conducting statistical sampling, playing games, or making random decisions, this tool delivers instant, reliable results entirely in your browser. Explore our related calculators and random tools for more resources.

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