Random Number Generator
Last updated: June 18, 2026Random numbers in any range.
Random Number Generator is a free online tool to random numbers in any range. It runs entirely in your browser, so your files never leave your device — nothing is uploaded. There's no sign-up, no watermark, and it works on any modern browser on desktop or mobile.
How to use Random Number Generator
The Random Number Generator produces one or many random numbers in any range, with an option for no repeats. It uses your browser's cryptographic random source, so results are genuinely unpredictable. Free and runs in your browser.
Read the full guide: How to Generate Random Numbers Online (Free)
- 1Set the minimum and maximum.
- 2Choose how many numbers and whether to allow repeats.
- 3Generate and copy the results.
Truly random
Uses crypto.getRandomValues, not a weak Math.random seed.
Unique mode
Generate numbers with no repeats for draws and lotteries.
Free & private
Runs on your device with no sign-up.
Draw unique raffle or lottery numbers
Running a giveaway or office raffle and need winning ticket numbers with zero duplicates? Set the Min and Max to your ticket range, set How many to the prizes you're drawing, and flip on No repeats. Every number comes out unique in one click, so no entry can win twice. Copy the comma-separated list straight into your spreadsheet or announcement.
Pick a fair contest winner by entry number
If your giveaway entries are numbered sequentially, set Min to 1 and Max to your total entry count, leave How many at 1, and hit Generate. You get a single winning entry number drawn from a cryptographically secure source, not a guessable Math.random seed. Re-run it on camera for transparency, or generate several at once with No repeats to pick backup winners too.
Generate random test data for developers
Need a quick batch of random integers to seed a database, stress-test an input field, or mock IDs? Set any range, including negatives, and bump How many up to 1000 numbers per click. Leave repeats on for realistic noisy data, or switch to No repeats for a unique set. Copy the comma-separated output and paste it directly into your code, JSON, or SQL.
Random Number Generator — frequently asked questions
How random are the numbers?
They come from the browser's cryptographically secure random generator, which is suitable for draws and games.
Can I get numbers with no duplicates?
Yes — turn on 'No repeats' to draw unique numbers, like for a raffle.
Is it free?
Yes, completely free.
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