Random Number Generator
Generate random numbers with full control over range and format
Frequently Asked Questions
How are the random numbers generated? +
This tool uses the browser's built-in Math.random() function, which produces pseudorandom numbers suitable for most general purposes like games, simulations, and random selection. For cryptographic applications, a different method should be used.
Can I generate random numbers without duplicates? +
Yes. Toggle the 'Allow Duplicates' option off to ensure every generated number is unique. Note that when generating integers without duplicates, the quantity cannot exceed the range size (e.g., you can't generate 20 unique numbers between 1 and 10).
What is the maximum range I can use? +
You can use any range from -999999999 to 999999999. The minimum value must be less than the maximum value. There's no practical limit on range size.
Can I generate decimal numbers? +
Yes. Switch the type from 'Integer' to 'Decimal' to generate random decimal numbers with up to 4 decimal places within your specified range.
How many numbers can I generate at once? +
You can generate up to 1000 numbers at once. If you need unique numbers (no duplicates), the quantity is limited by the size of your range for integers.