How Random Number Generator Works
Each number is picked uniformly at random from your chosen range (inclusive of both the minimum and maximum). With "No repeated numbers" checked, each value can only appear once, which requires the range to contain at least as many possible values as the count you're generating.
How to Use This Tool
- Set a minimum and maximum value.
- Choose how many numbers to generate.
- Optionally check No repeated numbers for a unique set (like a raffle draw).
- Select Generate.
Example
Generating 6 unique numbers between 1 and 49 works well for simulating a lottery-style draw, where the same number shouldn't be picked twice.
Helpful Tips
- For a coin flip, set the range to 1–2 and generate one number.
- "No repeated numbers" needs a range at least as large as the count — asking for 10 unique numbers between 1 and 5 isn't possible and will show an error.
Frequently Asked Questions
Is this truly random?
It uses standard JavaScript randomness, suitable for games, samples and everyday decisions. For high-stakes cryptographic use, a dedicated secure random source would be more appropriate.
Can the minimum be negative?
Yes, any whole number range is supported, including negative minimums.
Is my input sent anywhere?
No, numbers are generated entirely in your browser.
This tool runs entirely in your browser. Your input is not uploaded to any server.