Generate random numbers instantly — set your range, count and options
A random number generator (RNG) produces unpredictable numbers within a specified range. Computers can't generate truly random numbers — instead, they use pseudo-random algorithms that produce numbers indistinguishable from random for everyday use. The FileTools Random Number Generator uses your browser's built-in Math.random() function to generate up to 1000 numbers at once, with optional uniqueness and sorting. Whether you need a single number for a coin flip, ten numbers for a raffle drawing, or hundreds for a statistical sample, this tool produces fair, unbiased results instantly. All generation happens in your browser — no server is involved, and the tool works offline once loaded.
Common use cases: picking lottery numbers; running raffles or giveaways with a fair drawing; selecting winners from a list of entries; choosing students randomly in a classroom; rolling virtual dice for tabletop games; generating test data with realistic ranges; sampling rows from a dataset for analysis; creating random seeds for simulations or shuffles; assigning team numbers for tournaments; choosing random questions from a question bank; making impartial decisions when you can't decide; and statistical sampling for research or quality assurance.
With duplicates (default): each number is independent. Like rolling a die multiple times — getting a 6 doesn't prevent another 6 next roll. Use this for dice rolls, simulations, or sampling with replacement.
Without duplicates: every number in the output is unique. Like drawing names from a hat — once drawn, a number can't appear again. Use this for raffle winners, lottery picks, randomized rankings, or any "pick N from M" scenario. Note: the range must be at least as large as your count.
This tool uses JavaScript's Math.random(), which is a pseudo-random number generator (PRNG). It's fast and produces well-distributed numbers — perfect for raffles, classroom games, simulations, casual lottery picks, and any non-security purpose. For security-sensitive applications like generating passwords, encryption keys, or session tokens, you should use a cryptographically secure RNG instead. Try our Password Generator or Hash Generator, which use the secure crypto.getRandomValues() API for unpredictable output.
1. Enter the minimum value (negative numbers allowed)
2. Enter the maximum value
3. Choose how many numbers to generate (1 to 1000)
4. Optional: enable "No duplicates" for unique numbers only
5. Optional: enable "Sort results" to order them
6. Click "Generate"
7. Click "Copy" to copy results, or "Regenerate" for a new draw
✅ 100% free — no signup, no ads in tool, no tracking
✅ Generate 1 to 1000 numbers per draw
✅ Custom range with negative numbers supported
✅ Optional uniqueness and sorting
✅ Big single-number display for visual results
✅ Client-side only — runs offline once loaded
✅ Works on Windows, Mac, Linux, Android, iOS — any browser
Enter the minimum and maximum values for your range, set how many numbers you want (1 to 1000), and click Generate. Optional toggles let you ensure no duplicates and sort the output. The numbers are produced using your browser's built-in random function.
By default, each generated number is independent — the same number may appear multiple times in your output, just like rolling a die many times. Enabling "No duplicates" ensures every number in the result is unique, like drawing names from a hat without replacement. The unique mode requires the range to be at least as large as your count.
The generator uses JavaScript's Math.random() function, which is pseudo-random — sufficient for raffles, games, classroom activities, and most everyday uses. For cryptographic purposes (encryption keys, security tokens), use our Password Generator or Hash Generator instead, which use the more secure crypto.getRandomValues API.
Yes. The minimum and maximum fields accept negative numbers. For example, enter -100 and 100 to get random integers anywhere in that full range. Just make sure the minimum is less than or equal to the maximum.
No. All random number generation happens entirely in your browser using JavaScript. Nothing is uploaded, logged, or stored on any server. The tool works offline once the page is loaded.
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