Question 1

Is the random number generator truly random?

Accepted Answer

This tool uses JavaScript's built-in Math.random() function, which is a pseudo-random number generator (PRNG). It produces approximately random sequences based on seed values for most everyday uses (lotteries, testing, passwords). For cryptographically secure random numbers, consider using the secure random feature in our Password Generator.

Question 2

How to generate unique random numbers?

Accepted Answer

Check the 'Unique' option to generate non-repeating random numbers. The system uses the Fisher-Yates shuffle algorithm to draw the specified count of unique integers from the given range. Note: the count cannot exceed the range size (e.g., you can only generate up to 10 unique numbers from 1-10).

Random Number Generator

Custom Range: Set minimum and maximum values freely, supports negative numbers
Batch Generation: Generate up to 1000 random numbers at once
Unique Mode: Ensures every generated number is distinct
Sorted Output: Display results in ascending order
One-Click Copy: Copy results to clipboard