Random Number Generator

Generate random numbers in a range, with no-repeat option.

Runs entirely in your browser. Your data is never uploaded.

About Random Number Generator

Random Number Generator produces random integers within your chosen range, optionally unique — perfect for draws, testing and games.

Random Number Generator is one of dozens of free random & security tools on Crystal Toolkit. When you open this page, the tool loads in your browser and is ready to use immediately — there is nothing to install and no account to create. Everything you enter is handled locally using fast, modern web technology, so the work happens on your device rather than on a remote server. This approach keeps your information private, removes upload and download waiting time, and lets the tool keep working even on a slow connection once the page has loaded.

How to use Random Number Generator

1Set the min and max.
2Choose how many numbers.
3Generate the results.

Key features

Uses the browser's cryptographically secure random source
Never stores or transmits anything you generate
Lets you customise output to match your exact requirements
100% free with no sign-up, account or watermark
Mobile-first design that works on any device

Common use cases

Creating strong, unique passwords for new accounts
Running fair draws, picks and randomised tests
Generating identifiers, codes and QR codes on demand

Why use Crystal Toolkit?

Unlike many online random & security tools, Crystal Toolkit runs Random Number Generator entirely inside your browser. That means your data is processed on your own device and is never uploaded to a server, so it stays private and the results appear instantly. There is no sign-up, no daily limit and no watermark — just a fast, focused random number generator you can use as often as you like, on desktop or mobile. Crystal Toolkit is built and maintained by CrystalSoftonic and is funded by unobtrusive ads, which is how we keep every tool completely free.