Random · Browser tool
Random Number Generator
Generate secure random integers instantly. Your numbers never leave your browser.
How it works
Your browser's cryptographic random source generates unbiased integers in the chosen range. Results can allow duplicates or stay unique, and can be sorted or formatted before copying.
Frequently asked questions
Are the numbers generated securely?
Yes. This tool uses the browser Crypto API instead of Math.random(), with rejection sampling to avoid modulo bias.
Can I generate unique numbers?
Yes. Turn off Allow duplicates. The requested quantity must not exceed the number of integers available in the range.
Are my results sent anywhere?
No. Generation and formatting happen entirely in your browser, with no API request or storage.