Random Number Generator
Generate cryptographically secure random numbers
About the Random Number Generator
Whether you are drawing a raffle winner, picking lottery numbers, or seeding a simulation, you need randomness you can trust. This generator produces random numbers within any range you set, using your browser's cryptographically secure random source rather than a basic, predictable one.
It is built for the full spread of needs: generate one number or up to a thousand, allow or forbid duplicates, sort the output, and even produce decimals to a set number of places. Teachers randomize, contest runners draw winners, and developers grab quick test data, then copy the results or download them as a CSV.
How to Use the Random Number Generator
- Set the minimum and maximum of your range.
- Choose how many numbers to generate (1 to 1,000) and how many decimal places, if any.
- Tick "unique numbers only" to forbid duplicates, and "sort results" to order them.
- Generate, then copy the numbers or download them as a CSV; recent generations are kept in history.
Why Use ToolForge’s Random Number Generator
- It draws from your browser's cryptographically secure random source (crypto.getRandomValues), not the weaker Math.random, so the results are genuinely unpredictable.
- It can enforce unique numbers, sort the output, and produce decimals — covering draws, sampling, and simulation in one tool.
- Results export as CSV or copy to the clipboard, and a history keeps your last several generations.
- Everything runs locally with no account.
Frequently Asked Questions
Are these numbers truly random?
They are cryptographically secure pseudo-random numbers from your browser's crypto API, which is far less predictable than ordinary random functions. For raffles, sampling, and general use this is effectively random; it is not, however, certified for regulated gambling.
How do I draw numbers without repeats?
Enable "unique numbers only". The generator then ensures no value appears twice — useful for raffles or lottery picks. Just make sure your range is at least as large as the count you request, or unique numbers cannot fill it.
Can it generate decimals, not just whole numbers?
Yes. Set the number of decimal places above zero and the generator returns decimal values within your range, rounded to that precision — handy for simulations or random measurements.
Are the minimum and maximum included in the range?
Yes. For whole numbers the range is inclusive of both ends, so a range of 1 to 10 can produce both 1 and 10. Set the bounds to exactly the smallest and largest values you want to allow.
