Random Number Generator
Generate random numbers instantly. Set range, count, and options. Nothing stored or sent.
What Is a Random Number Generator?
A random number generator (RNG) produces numbers that lack any predictable pattern. This tool uses your browser's built-in Math.random() to generate numbers within a specified range. It's useful for raffles, games, sampling, simulations, and any scenario where unbiased number selection is needed.
How to Generate Random Numbers
- Set Range — Enter the minimum and maximum values
- Choose Count — Specify how many numbers to generate (1 to 1000)
- Select Type — Pick integer or decimal output
- Options — Enable "No Duplicates" for unique results, choose sort order
- Generate — Click the button and copy your results
Why Use This Random Number Generator?
- Flexible Range — Any min/max range including negative numbers and decimals
- Bulk Generation — Generate up to 1,000 numbers at once
- No Duplicates Option — Ensure every number is unique when needed
- Sorting Built-in — Sort ascending, descending, or keep original order
- Private — Runs entirely in your browser, no data sent anywhere
FreeToolbox vs Other Random Number Generators
| Feature | FreeToolbox | Random.org | Calculator.net |
|---|---|---|---|
| Privacy | Browser-only | Server-based | Server-based |
| Bulk Generate | Up to 1,000 | Up to 10,000 (paid) | Limited |
| Decimals | Yes | No | Yes |
| No Duplicates | Yes | Yes | No |
| Sort Options | Yes | No | No |
| No Account | Yes | Free tier limited | Yes |
FAQ
Are these numbers truly random?
They use JavaScript's Math.random(), which is a pseudo-random number generator suitable for general purposes like games, raffles, and simulations. For cryptographic use, consider a dedicated CSPRNG.
Can I generate negative numbers?
Yes. Set the minimum value to any negative number. For example, min: -100, max: 100 will generate numbers in that range.
What does 'No Duplicates' do?
When enabled, every number in the result set will be unique. If you request more unique numbers than possible in the range, you'll see an error message.
Is my data stored anywhere?
No. All number generation happens in your browser. Nothing is sent to any server. History is stored only in your current browser session.
Can I generate decimal numbers?
Yes. Choose 'Decimal (2 places)' or 'Decimal (4 places)' from the Number Type dropdown to generate numbers with decimal precision.