Random Number

Yes. This tool uses the Web Crypto API (crypto.getRandomValues()) which provides cryptographically secure pseudo-random numbers. This is the same source of randomness used for encryption and security-critical applications in browsers.

When Unique is enabled, no number will appear more than once in the results. This is useful for lottery draws, random sampling without replacement, or generating unique IDs. The count cannot exceed the range size when Unique is enabled.

You can set any integer range. The tool handles ranges up to several billion values. For very large ranges, the cryptographic random generation ensures uniform distribution across the entire range.

Yes. The cryptographic randomness makes this tool suitable for fair drawings and contests. Each number has an equal probability of being selected, with no pattern or bias.