RU

Random Number Generator Online

Free tool for generating random numbers with range and uniqueness settings

random-number

Set parameters and click Generate
Ctrl+Enter

ResultUnique: Off
Was this tool helpful?
🎯

Range

Generate numbers within a specified range

#

Count

Generate multiple numbers at once

✦

Unique

No duplicate numbers mode

±

Negative

Support for negative ranges

Related Tools

UUID Generator

Generate and validate UUID and ULID

Lorem Ipsum Generator

Generate Lorem Ipsum placeholder text

Password Generator

Generate strong passwords with strength estimation

Timer

Online timer and stopwatch with lap times

Frequently Asked Questions

The generator uses the browser's built-in algorithm to produce pseudorandom numbers. Each number is computed using a mathematical formula based on an initial seed value, ensuring uniform distribution within the specified range.
Pseudorandom numbers are generated by an algorithm and are theoretically predictable if the seed is known. Truly random numbers are based on physical processes such as thermal noise. For most tasks, pseudorandom numbers are sufficient.
The generator is used for lotteries and raffles, creating test data, random sampling, assigning participants to groups, and board games.
The algorithm generates numbers with equal probability for each value in the range. In unique number mode, the Fisher-Yates shuffle algorithm is used, which guarantees an unbiased random permutation.