Online Tool Store
Random Number Generator
Generate one or more random integers within any range, with an optional no-duplicates mode. Runs entirely in your browser — nothing is uploaded.
🔒 This tool runs entirely in your browser. Your files are never uploaded to a server.
How it works
- Set your min and max, and how many numbers you want.
- Turn on "No duplicates" if you don't want the same number twice in one batch.
- Click Generate — new numbers appear instantly, ready to copy.
Each number comes from JavaScript's Math.random(),
scaled to your range so every whole number from min to max has an equal chance of coming up.
In "No duplicates" mode, the full range is shuffled and the first however-many values are
taken, rather than re-rolling until a new one turns up — faster, and just as fair.
FAQ
Does anything get sent anywhere?
No. Every number is generated locally in your browser using JavaScript's built-in random number source — nothing is uploaded or logged.
Is this good enough for something like a raffle or giveaway pick?
Yes, for everyday use — picking a winner, choosing a number, deciding who goes first. It isn't a cryptographically secure random number generator, so don't use it to generate anything security-sensitive like passwords or encryption keys.
Can both the min and max be negative?
Yes — enter any whole numbers for min and max, positive or negative, as long as min is less than or equal to max.
What does "No duplicates" do?
With it on, every number generated in one batch is unique — useful for things like drawing raffle numbers or dealing out unique picks. It's only possible up to the size of your range, so requesting more unique numbers than the range contains shows an error instead of a wrong result.
Are all numbers in the range equally likely?
Yes — each generated number has an equal chance of being anywhere in your min-to-max range, inclusive of both endpoints.
How we compare
| Feature | Online Tool Store | random.org | Rolling real dice |
|---|---|---|---|
| No file upload — runs in your browser | ✓ | Requests go to their server | ✓ |
| Instant, no daily limits | ✓ | Free quota is rate-limited | ✓ |
| Any custom range, any batch size | ✓ | ✓ | Limited to the die's own faces |
random.org uses atmospheric noise for true randomness, which is worth it for high-stakes draws, but it's a network request with rate limits. For everyday picks — a number to settle an argument, a raffle draw, a quick decision — Random Number Generator is instant and has no limits.