Random Number Generator
Generate random numbers within a custom range
What is Random Number Generator?
Random Number Generator is a free online tool that produces random numbers within a specified range. It supports integers and decimal numbers, batch generation of multiple numbers, unique number sets (no duplicates), and sorting. Useful for games, statistics, simulations, testing, and sampling.
How to Use Random Number Generator
- Set the minimum and maximum values for your range
- Choose how many numbers to generate (1 – 10,000)
- Optionally set decimal places for floating-point numbers
- Enable “Unique” to avoid duplicate values
- Click Generate and copy the results
Features
- Custom min/max range
- Batch generation up to 10,000 numbers at once
- Integer and decimal number support
- Unique mode — no duplicate values
- Sort results ascending or descending
- Copy all results to clipboard in one click
- 100% client-side — uses browser's Math.random()
Frequently Asked Questions
Is this truly random?
This tool uses the browser's built-in Math.random(), which is a pseudo-random number generator (PRNG). It's suitable for most everyday uses like games, sampling, and testing, but not for cryptographic or security-critical applications. For cryptographic randomness, use the Web Crypto API.
How many numbers can I generate at once?
You can generate up to 10,000 numbers in a single click. For unique numbers, the count is automatically capped by the size of the range.
Can I generate lottery numbers?
Yes! Enable “Unique”, set your range (e.g. 1–49), set count to 6, and hit Generate. You'll get 6 unique random numbers — perfect for lottery picks.
What are decimal places used for?
Setting decimal places to 1 or more generates floating-point numbers (e.g. 3.14, 7.82). Useful for simulating measurements, probabilities, or any data requiring precision.