Random Number Generator
Free random number generator. Generate random numbers, dice rolls, coin flips, and lottery numbers. Supports ranges, multiple numbers, decimals, and more.
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Add this tool to your website with customizable styling
How to Use
- 1 Set your range — Enter minimum and maximum values for your random numbers. The generator works with any range from negative to positive numbers.
- 2 Choose options — Select quantity (1-100 numbers), decimal places (0-4), whether to allow duplicates, and sorting preference (none, ascending, or descending).
- 3 Use quick presets — Click preset buttons for common scenarios: Dice Roll (1-6), Coin Flip (Heads/Tails), Lottery (6 numbers from 1-99), Card Draw (1-52), or Percentage (0-100).
- 4 Generate numbers — Click the Generate button to create your random numbers. Results appear instantly with smooth animations and are automatically added to your history.
- 5 Copy and reuse — Copy individual numbers or all results to clipboard with one click. View your last 10 generations in the history section for easy reference.
Frequently Asked Questions
How does the random number generator work?
This tool uses JavaScript's built-in Math.random() to generate pseudorandom numbers within your specified range. Each generation is independent and unpredictable enough for everyday purposes like games, raffles, and decision-making. While results are sufficiently random for casual use, Math.random() is not cryptographically secure and should not be used where strong randomness guarantees are required.
Can I generate multiple random numbers at once?
Yes! Use the quantity control to generate up to 100 random numbers in a single click. You can choose to allow duplicates or enforce unique numbers only. The unique mode ensures no number appears twice, perfect for lottery draws or raffle selections.
What are the quick presets for?
Presets provide instant configurations for common use cases: Dice Roll simulates a 6-sided die, Coin Flip gives Heads or Tails, Lottery generates 6 unique numbers from 1-99, Card Draw picks from a 52-card deck, and Percentage generates a number from 0-100. These save time and eliminate setup errors.
How do decimal places work?
Choose 0 decimal places for integers only, or select 1-4 decimal places for floating-point numbers. This is useful for scientific calculations, statistical sampling, or generating precise random values. The decimal option works with any range you specify.
Is this random number generator secure for sensitive applications?
This tool is suitable for games, raffles, educational purposes, and general decision-making. However, for cryptographic applications, security tokens, or high-stakes scenarios requiring provably fair randomness, use specialized cryptographic random number generators. All generation happens locally in your browser—no data is sent to any server.