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Random Number Generator

Generate one or many random numbers in a range you choose, with or without duplicates. Uses crypto.getRandomValues for true randomness.

Generate one or many random numbers in a range you choose, with or without duplicates. Uses crypto.getRandomValues for true randomness.

Quick start: Set the minimum and maximum values of the range. → Choose how many numbers you want to generate. → Toggle 'Allow duplicates' on or off depending on your use case.

How to use Random Number Generator

  1. 1

    Set the minimum and maximum values of the range.

  2. 2

    Choose how many numbers you want to generate.

  3. 3

    Toggle 'Allow duplicates' on or off depending on your use case.

  4. 4

    Click Generate to produce the random numbers using the Web Crypto API.

  5. 5

    Copy the result to your clipboard or regenerate for a new sequence.

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Who is Random Number Generator for?

Developers generating test data

Teachers running classroom raffles or picks

Tabletop gamers rolling dice digitally

Event organizers running random drawings

Researchers selecting random samples

Why use Random Number Generator?

  • Uses crypto.getRandomValues for cryptographic-quality randomness (unlike Math.random).
  • Supports any range and any count with or without duplicates.
  • Instant generation even for hundreds of numbers.
  • Completely client-side — no network calls and no tracking.
  • Free, no sign-up, and no daily generation limits.

Common use cases

  • Pick lottery numbers or lucky number picks.
  • Run a random giveaway drawing from a list of entrant numbers.
  • Generate test data for software development.
  • Roll dice for tabletop RPGs or board games digitally.
  • Select random participants for surveys or focus groups.

About Random Number Generator

Most random number generators online quietly use Math.random, which is neither cryptographically secure nor uniformly distributed. Xevon Tools' Random Number Generator uses the Web Crypto API's crypto.getRandomValues, which draws from the operating system's secure random source — the same quality used for encryption keys and authentication tokens. Set any range, any count, and choose whether duplicates are allowed. Generate single numbers for a dice roll, or hundreds for a giveaway drawing or test data set. Everything runs in your browser with no network requests, no logging, and no account. It's a tiny utility that disappears until you need it, then gives you the right answer every time.

Frequently asked questions

The Web Crypto API's getRandomValues is cryptographically secure — suitable for security-sensitive uses like token generation, not just games.
Yes — disable the 'Allow duplicates' toggle. Note that the count cannot exceed the range size when duplicates are off.
Any 32-bit range (up to about 4.3 billion) works instantly. Larger ranges still work but are rarely needed.
No — cryptographic randomness is deliberately non-reproducible. For seeded randomness, use a different tool.

Your files never leave your device

Every tool on Xevon Tools runs 100% in your browser. No uploads, no servers, no tracking. Free forever.

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Embed Random Number Generator on your site

Add this tool to your own website, blog, or internal tool page with one line of code. Free to use, no attribution required (but appreciated).

<iframe src="https://xevontools.com/embed/random-number-generator" width="100%" height="640" style="border:1px solid #e2e8f0;border-radius:12px;" title="Random Number Generator — Xevon Tools"></iframe>
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