Random Number Generator
Generate one or many random numbers between any range you choose.
What is it?
A **random number generator** is a tool that produces numbers with no predictable pattern, selected from a range you define. Whether you need a single number for a quick decision or a large batch for a simulation or game, this free online tool delivers results instantly without any installation or account required. Randomness is more useful than most people realise. Researchers use random numbers to assign subjects to control and treatment groups. Teachers use them to pick students for participation. Developers use them for testing and seeding data. Gamers use them to settle disputes or introduce chance into board games and roleplaying scenarios. And sometimes you just need to pick a winner, choose a restaurant, or make a decision without bias. This generator uses the browser's built-in cryptographically informed pseudo-random engine, producing results that are statistically uniform across your chosen range. You can generate anywhere from 1 to 10,000 numbers at once, and choose whether duplicates are allowed or if every result must be unique — perfect for lottery draws or raffle picks.
How to use it
- Set the minimum value (default: 1) and maximum value (default: 100).
- Choose how many numbers you want to generate (1–10,000).
- Toggle "No duplicates" if every result must be unique within the set.
- Click "Generate" to produce your random numbers.
- Use "Copy" to copy all results to your clipboard, or "Sort" to order them numerically.
Why use this tool
Most random number generators online are cluttered with ads, require sign-up, or only let you generate a single number at a time. This tool is different: clean, fast, and built for real use cases. Need to run a raffle with 500 ticket holders? Generate 1 winner from 1 to 500 with no duplicates. Running a statistics exercise? Generate 1,000 numbers from 1 to 100 and analyse the distribution. Playing a board game and lost the dice? Set 1–6 and generate. The flexibility of this tool makes it genuinely useful across dozens of everyday and professional scenarios. Because all randomisation happens locally in your browser, your inputs are never sent to any server. Everything is instant, private, and completely free.
Frequently asked questions
Is this random number generator truly random?
It uses the browser's Math.random() function, which is a pseudo-random number generator (PRNG). The results are statistically uniform and unpredictable for everyday uses — games, raffles, classroom picks, and simulations. For cryptographic security, use a dedicated hardware random source.
What is the maximum number of results I can generate?
You can generate up to 10,000 numbers at once. If you enable "no duplicates", the range must be at least as large as the quantity you want.
Can I generate decimal numbers?
The generator produces integers (whole numbers) by default. Toggle "Include decimals" in the options to get results with two decimal places.
How do I use this for a lottery or raffle?
Set the minimum to 1, the maximum to your total number of entries, set the quantity to how many winners you want, enable "No duplicates", then click Generate. Each result will be a unique winning ticket number.
Can I generate negative numbers?
Yes. Simply set the minimum to a negative value — for example, min: -50, max: 50 — and the generator will include negative numbers in the possible results.