CodeMaster AcademyWhat "random" means in a browser
This generator uses the Web Crypto API's crypto.getRandomValues(), a cryptographically secure random number source built into modern browsers — the same underlying mechanism used to generate secure tokens and keys, rather than the older, weaker Math.random() function that's predictable enough to reconstruct in some cases if an attacker knows earlier outputs. For picking a raffle winner or rolling a die, either would work fine; for anything security-adjacent, the distinction matters.
Setting a meaningful range
A random number generator is only as useful as the range you give it. Set the minimum and maximum to match your actual use case — 1 to 100 for a general random pick, 1 to 6 for a die roll, or a custom range for a raffle with a specific number of entries. The generator draws uniformly across the full range you specify, meaning every number has an equal chance of appearing, with no bias toward the middle or edges of the range.
Common use cases
- Games and tabletop play: Simulating dice rolls or card draws without physical props.
- Raffles and giveaways: Picking a winner from a numbered list of entries fairly.
- Sampling: Selecting random participants or items from a numbered dataset for research or QA testing.
- Decision-making: Breaking ties or making arbitrary choices when there's no principled reason to prefer one option.
What this tool isn't for
While this generator uses a cryptographically secure source, it's built for general-purpose random number needs — dice rolls, picks, sampling — not for generating cryptographic keys, encryption material, or anything requiring formal security certification. For those specialized needs, use a purpose-built security library with proper key management, not a general web tool.
Using this generator
Enter your minimum and maximum values, choose how many numbers you want generated at once, and press generate. Everything runs locally in your browser — no numbers or ranges are sent anywhere.
Common questions
Can the same number repeat if I generate multiple at once?
By default, yes — each number is drawn independently. If you need unique, non-repeating numbers (like a raffle with no duplicate winners), check whether the tool's settings include a "no duplicates" option before running a draw.
Is this suitable for a real prize drawing?
For casual giveaways, yes. For anything with legal or contractual stakes (a large cash prize, a regulated lottery), consult local regulations, since some jurisdictions require specific auditable random-drawing procedures.
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Page last reviewed: July 2026