Bytelify

Random Number Generator

Generate random numbers in any range, one or thousands at a time, instantly in your browser.

Runs in your browser, nothing sent
random-number-generator

Generated with your browser's Math.random(). Not cryptographically secure — don't use these for passwords, tokens, or anything security-sensitive.

Need the opposite? Random Decimal Number Generator

What is Random Number Generator?

Pick a minimum and maximum, how many numbers you need, and generate instantly. Useful for picking a random winner, generating test data, running a quick simulation, or settling an argument about whose turn it is. Numbers are generated with your browser's built-in Math.random(), entirely on your device. Nothing you enter is sent anywhere.

How to Use the Random Number Generator

  1. 1

    Set the Min and Max: Enter the lowest and highest whole number you want possible.

  2. 2

    Choose How Many: Set the batch size, up to 10,000 numbers at once.

  3. 3

    Enable No Duplicates (Optional): Check this if every number in the batch needs to be unique.

  4. 4

    Generate and Copy: Generate the numbers and use the copy button to use them elsewhere.

How It Works

Each number is generated with your browser's built-in Math.random(), scaled to fall within your chosen minimum and maximum and rounded to a whole number. With "No duplicates" enabled, the tool tracks which values it's already produced and skips repeats, rather than generating a batch and hoping nothing collides. Everything runs locally in your browser. No request is sent anywhere, so there's no server-side log of what was generated.

Common Use Cases

  • Picking a random winner for a giveaway, raffle, or deciding whose turn it is.

  • Generating quick test data (sample IDs, row counts, or dummy scores) for a script or spreadsheet.

  • Running a lightweight simulation, like a Monte Carlo estimate or a dice-roll stand-in, without writing generation code yourself.

FAQs

Frequently Asked Questions

Common questions about Random Number Generator.

For picking a casual winner or a quick decision, yes. Math.random() is not cryptographically secure, so for high-stakes drawings with strict fairness/auditability requirements, use a purpose-built, certified random number service instead.

Yes, check "No duplicates" and each number in the result will be unique. If you ask for more unique numbers than fit in your min-max range, the tool will tell you rather than silently repeating values.

Up to 10,000 numbers in a single batch, which keeps the page responsive.

Yes, Bytelify's Random Number Generator is free with no account or sign-up required.

No. Generation runs entirely client-side in your browser, so nothing you enter is sent anywhere.