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Random Number Generator

Generate random integers, decimals, sequences, dice rolls, coin flips, or pick random items from a list.

Result

Click Generate to roll the dice…

What makes this random?

This tool uses the browser's built-in cryptographically-secure random source — crypto.getRandomValues() — seeded by your operating system's entropy pool. The output is unpredictable and suitable for draws, giveaways, test data, lottery simulations, and any case where you want numbers that a malicious observer couldn't guess. It is not meant for generating encryption keys — for that, use a dedicated cryptographic library.

Modes explained

  • Integer — whole numbers between a minimum and maximum. Use "unique" to simulate drawing from a hat (numbers won't repeat).
  • Decimal — floating-point numbers in a range, to any precision up to 15 decimal places.
  • Sequence — a shuffled list of every integer from Start to End. Good for assigning random positions or prizes.
  • List pick — paste a list and let the tool pick one or more items at random. Perfect for giveaways or decisions.
  • Dice — roll any number of standard dice (d4, d6, d8, d10, d12, d20, d100) for tabletop games.
  • Coin — simulate up to 1,000 coin flips and see the heads/tails ratio.

Is it really unbiased?

Yes. The implementation uses rejection sampling so that mapping raw 32-bit random numbers to your chosen range doesn't introduce modulo bias — the same approach used by professional lottery and statistics software. Every value in your range has exactly equal probability.

Common use cases

  • Pick a winner from a list of entries.
  • Generate test data (ages, prices, IDs) for dev work.
  • Seed research or simulations where reproducibility isn't required.
  • Settle disputes or decisions ("flip a coin for it").
  • D&D, board games, and role-playing sessions.
ABOUT THIS TOOL

What is Dice Roller?

The Dice Roller tool by D&D Technology is designed to enhance your tabletop gaming experience by allowing you to easily roll any combination of dice, from d4 to d100. This tool ensures fairness and accuracy, eliminating the need for physical dice while providing a seamless digital alternative. Whether you're playing Dungeons & Dragons, Pathfinder, or any other tabletop game, our Dice Roller can help you keep the game flowing smoothly.

Key benefits of the Dice Roller include its user-friendly interface and the ability to customize your rolls according to your game's requirements. You can quickly select the type and number of dice, and with just a click, receive instant results. This not only saves time but also minimizes the chances of errors that can occur with traditional dice rolling.

Ideal for gamers, educators, and anyone involved in tabletop role-playing games, this tool is perfect for both casual players and serious enthusiasts. It can be used in various settings, whether at home, at a gaming convention, or even online with friends. The Dice Roller is a versatile solution that caters to the needs of different types of games and players.

At D&D Technology, we strive to provide practical digital solutions that enhance your gaming experience. The Dice Roller is just one of our many free online tools designed to support gamers and streamline gameplay. Explore our services and discover how we can assist you in your digital transformation journey.

Start enjoying a fair and accurate rolling experience today with our Dice Roller. Visit [D&D Technology](https://www.designanddevelopment.tech/tools/dice-roller) to get started!

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