What is a Random Number Generator?
A random number generator (RNG) is a tool that produces numbers with no predictable pattern. Our free online random number generator uses the browser's built-incrypto.getRandomValues() API — a cryptographically secure source that produces genuinely unpredictable results, unlike the older Math.random()which uses a pseudo-random algorithm.
Whether you need a single number between 1 and 10, or 100 unique numbers between 1 and 10,000, this tool handles it instantly without any server-side processing. Everything runs in your browser, so your data never leaves your device.
How to Use the Random Number Generator
- Enter your minimum value (e.g. 1).
- Enter your maximum value (e.g. 100).
- Set how many numbers you want (1–100).
- Optionally enable No duplicates to ensure all numbers are unique.
- Click Generate and copy results with one click.
Common Use Cases
- Giveaways & lotteries — pick a winner fairly from a numbered list.
- Games & simulations — roll dice, deal cards, or simulate coin flips.
- Statistical sampling — select random rows from a dataset.
- Password seeds — create inputs for stronger credential generation.
- Education — generate practice problems or random quiz questions.
- Decision making — use randomness to break deadlocks or assign tasks.
True Random vs Pseudo-Random
Most programming languages use pseudo-random number generators (PRNGs) — algorithms that produce sequences which appear random but are deterministic given the same seed. This tool uses crypto.getRandomValues(), which draws from the operating system's entropy pool (e.g. hardware noise, timing jitter), making each number statistically independent and unpredictable. This is the same standard used in cryptographic key generation.
Frequently Asked Questions
Can I generate numbers between any range?
Yes. Set any integer as your minimum and maximum. Negative numbers work too — for example, min -50, max 50 gives you numbers across that full range.
What does "no duplicates" mean?
With no duplicates enabled, each generated number appears only once in the result set. This is useful for lottery draws or unique identifier generation. Note that the count cannot exceed the size of the range (max − min + 1) when this option is active.
Is this truly random?
Yes. We use crypto.getRandomValues() which is cryptographically secure. It is not seeded by a clock or counter, so results cannot be predicted or replicated.
How many numbers can I generate at once?
You can generate up to 100 numbers per click. For larger datasets, simply adjust and click Generate multiple times, or contact us for a bulk API solution.
Does this tool store my results?
No. All computation happens in your browser. No data is sent to any server. Results are not logged or stored anywhere.
Can I generate random numbers between 1 and 6 (dice)?
Absolutely. Set min to 1, max to 6, count to 1, and click Generate. Each click simulates a single fair die roll. Increase count to simulate multiple dice.