Random Number Generator
Generate cryptographically secure random numbers, roll dice, flip coins.
Numbers will appear here
🔒 Uses the Web Crypto API for cryptographically secure randomness. No data sent to any server.
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Random Number Generator
Generate cryptographically secure random numbers using your browser's built-in Crypto API. Set any range, generate multiple numbers at once, and choose whether duplicates are allowed. Perfect for games, contests, giveaways, statistical sampling, and decision-making. Beyond basic number generation, our tool includes a virtual dice roller supporting standard tabletop RPG dice (d4, d6, d8, d10, d12, d20), a fair coin flipper, and a list randomizer that shuffles any list you paste in.
How to use Random Number Generator
- Set your minimum and maximum values and the quantity of numbers to generate.
- Toggle "No duplicates" if you need unique numbers only.
- Click "Generate" to create your random numbers.
- Use the Dice Roller, Coin Flip, or List Randomizer tabs for other random tools.
Features
- Custom range — Set any min and max values for number generation.
- No duplicates option — Ensure every generated number is unique.
- Dice roller — Roll d4, d6, d8, d10, d12, and d20 dice.
- Coin flip — Fair heads/tails result.
- List randomizer — Paste any list and shuffle it randomly.
- Cryptographically secure — Uses window.crypto.getRandomValues() for true randomness.
Frequently Asked Questions
Are these random numbers truly random?
Our generator uses the Web Crypto API (window.crypto.getRandomValues), which provides cryptographically secure pseudorandom numbers. This is significantly more random than standard Math.random() and suitable for contests, security applications, and fair drawings.
Can I generate random numbers without repeats?
Yes. Enable the "No duplicates" option to ensure every generated number is unique. This is perfect for lottery draws, random assignments, or creating unique identifiers. The quantity must not exceed the range size.
How does the dice roller work?
Select your dice type (d4 through d20), choose how many dice to roll, and click roll. Each die generates an independent random result using the Crypto API. The total sum is displayed alongside individual results.