Random Number Generator
Generate random numbers within a range. Set minimum, maximum, and count. Option to allow or exclude repeats. Good for raffles, sampling, and testing.
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How to Use This Tool
- Set the minimum and maximum range for your random numbers.
- Choose how many numbers you want to generate.
- Optionally allow or disallow duplicate numbers.
- Click 'Generate' and copy the results.
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Frequently Asked Questions
How are random numbers generated?
This tool uses the browser's cryptographically secure random number generator (crypto.getRandomValues) for true randomness, not predictable pseudo-random algorithms.
What is the difference between true random and pseudo-random?
True random numbers are generated from physical phenomena (like electronic noise) and are completely unpredictable. Pseudo-random numbers use mathematical formulas that can theoretically be predicted if you know the seed value.
Can I generate unique random numbers without duplicates?
Yes. Enable the 'no duplicates' option and the tool will ensure each generated number is unique within your specified range.
What is the maximum range I can use?
You can generate random numbers within any reasonable range. Very large ranges with 'no duplicates' enabled may be limited by the number of unique values available in that range.
Is this random number generator truly random?
Our random number generator uses the browser's cryptographic random number API (Crypto.getRandomValues), which provides cryptographically secure random numbers suitable for most practical purposes.