Cryptographic Random Number Generator Free
Generate truly random numbers within custom ranges with sorting and unique options using Web Crypto.
- 100% free
- Files stay on your device
- No sign-up, no watermark
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What is Cryptographic Random Number Generator?
The Random Number Generator produces random integers between a minimum and maximum you choose — for lotteries, raffles, sampling, games and testing. Generate several numbers at once, sort them ascending or descending, and choose "unique numbers only" to prevent duplicates, for example 6 unique numbers from 1 to 49. Numbers come from crypto.getRandomValues(), a cryptographically secure source.
How to use Cryptographic Random Number Generator
- 1
Set the range
Enter the minimum and maximum values.
- 2
Choose count and options
Pick how many numbers, sorting, and whether they must be unique.
- 3
Generate
Press Generate Numbers and copy the results.
Frequently asked questions
Are the numbers truly random?
They come from the browser’s cryptographically secure generator, suitable for fair draws and security-sensitive uses.
Are the minimum and maximum included?
Yes. Both ends of the range can be drawn.
How do I pick lottery numbers?
Set the range (for example 1–49), the count (6) and enable unique numbers only.
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