🎲 Random Number Generator
Instantly generate cryptographically secure random integers or decimals within any range — completely free and runs offline in your browser with no sign-up or file uploads required.
Settings
About
This tool uses the browser's built-in crypto.getRandomValues API to produce unbiased, cryptographically secure random numbers — far stronger than Math.random(). You can generate up to 10,000 numbers at once, choose unique-only values, control decimal places, and copy all results with one click. Because everything runs in your browser, your inputs and results never leave your device — no server, no tracking, no account needed.
How to use
- Set the Min and Max values for your desired range (e.g., 1 to 100).
- Enter the Count of numbers you want to generate (up to 10,000).
- Optionally check 'Unique values only' to avoid duplicates, or 'Decimals' to generate floating-point numbers and set decimal places.
- Click Generate (or press Enter) to produce your random numbers instantly.
- Click 'Copy all' to copy every result to your clipboard, or 'Regenerate' to get a fresh set.
FAQ
- Is this random number generator free?
- Yes, completely free with no hidden costs, no sign-up, and no usage limits.
- Does it work offline? Do I need an internet connection?
- Yes. The tool runs entirely in your browser. Once the page loads, it works without any internet connection.
- Do you upload my data or store my numbers on a server?
- No. All generation happens locally in your browser using JavaScript. Nothing is ever sent to a server.
- How is this different from Math.random()? Is it truly secure?
- Yes. This tool uses crypto.getRandomValues, the browser's cryptographically secure pseudo-random number generator (CSPRNG), which is far stronger and unbiased compared to Math.random().
- Can I generate unique random numbers without duplicates?
- Yes. Enable the 'Unique values only' option and the tool will guarantee no duplicate integers in your results, using a cryptographically secure Fisher-Yates shuffle.