Free Random Number Generator
NToolHub’s Random Number Generator produces genuinely unpredictable numbers using your browser’s cryptographic random source — not a weak pseudo-random formula. Teachers use it for quizzes, developers for test data, and organizers for raffles. Set any minimum and maximum, choose how many numbers you need, and optionally enforce uniqueness or sort the results.
How to Use the Random Number Generator
- Set the minimum, maximum, and quantity of numbers.
- Toggle unique-only to avoid repeats, or sort to order results.
- Click “Generate Numbers” for instant results.
- Copy the list to your clipboard with one click.
Features
Numbers come from the cryptographic random source browsers use for security, with rejection sampling to eliminate modulo bias. You can generate up to 1,000 numbers per click across any integer range, enforce uniqueness with automatic range validation, and sort results ascending.
Benefits & Use Cases
Fair randomness matters for giveaways, sampling, and games — this tool gives every number in the range an equal chance. Because generation happens locally, results are instant and private, with no server that could log or influence the outcome.
Tips
For raffles, enable unique-only so no ticket number is drawn twice. If you need a random order rather than random values, try the Shuffle List tool. Large ranges work fine — the generator handles anything from 1–6 up to millions.
Frequently Asked Questions
Are the numbers truly random?
They come from your browser’s cryptographic random number generator, which gathers entropy from the operating system. This is far stronger than basic pseudo-random functions.
Why does it refuse some unique requests?
You cannot draw more unique numbers than exist in the range. For example, a range of 1 to 10 can produce at most 10 unique numbers.
Can I generate decimal numbers?
This tool generates whole numbers only. For decimals, generate integers and divide, or use a spreadsheet.
Is there a limit to how many numbers I can generate?
You can generate up to 1,000 numbers per click, which covers raffles, sampling, and test data needs.
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