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 works right here on your device — nothing gets sent out.
How it works
- Set your min and max, and how many numbers you want (up to 1,000).
- Turn on "No duplicates" if you don't want the same number twice in one batch, and choose an Order if you want the results sorted.
- Click Generate — new numbers appear instantly, ready to copy or download.
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, a range small enough to shuffle directly (or where most of it is needed) is shuffled and the first however-many values are taken. For a small batch drawn from a huge range, it instead draws numbers one at a time into a set until enough unique ones are collected — fast either way, and never freezes the tab trying to lay out a billion-entry list first.
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.
Can I sort the results?
Yes — set "Order" to Ascending or Descending before you generate, or leave it on "As generated" to see the numbers in the order they came out.
How many numbers can I generate at once?
Up to 1,000 per batch, from any range — including a small range with a huge span, like 1 to 1,000,000,000, without slowing down.
How we compare
| Feature | Online Tool Store | random.org | Calculator.net | NumberGenerator.org |
|---|---|---|---|---|
| Runs entirely in the browser — no network request to generate | ✓ | Requests go to their atmospheric-noise service | ✓ | ✓ |
| No rate limits or daily quota | ✓ | Free quota is rate-limited | ✓ | ✓ |
| Sort results ascending or descending | ✓ | Not offered | ✓ | ✓ |
| Copy and download the result list | ✓ | View only, no export | No copy or download option | ✓ |
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. Calculator.net and NumberGenerator.org both add sorting like this tool now does; NumberGenerator.org also matches on copy and download. For everyday picks with no limits and no ads, Random Number Generator keeps up with all three while staying instant and browser-only.