Random Number Generator
Generate random numbers with custom ranges. Perfect for games, lotteries, raffles, and decision making. Supports single numbers, multiple numbers, and various presets.
Configuration
Quick Presets
Our random number generator creates truly random numbers using cryptographically secure randomness. Generate single numbers or multiple numbers at once, with optional duplicate prevention and sorting. Perfect for selecting winners, rolling dice, generating lottery numbers, or any application requiring unbiased random selection.
When to Use This Tool
- Selecting winners in raffles and giveaways fairly
- Generating lottery or lucky dip numbers
- Simulating dice rolls for board games or RPGs
- Creating test data for software development
- Selecting random samples for research or surveys
- Making fair decisions when you need an unbiased choice
How to Use
Generate a Single Number
- Set the minimum and maximum range for your number
- Click 'Generate' to get a random number within that range
- Use the copy button to use the number elsewhere
- Generate again for a new random number
Generate Multiple Numbers
- Set your minimum and maximum values
- Choose how many numbers to generate
- Select whether duplicates are allowed or not
- Click 'Generate' to see your list of random numbers
Using for Games and Raffles
- Set range based on total participants (e.g., 1-100)
- Generate one number per entrant for fair selection
- Record the generated numbers for verification
- Ensure range matches number of entries to avoid unused numbers
Examples
Raffle Winner Selection
Select a single winner from 50 participants
Input
Range: 1-50 | Count: 1
Result
Winner: 23
Lotto Number Generation
Generate lottery-style numbers without repeats
Input
Range: 1-49 | Count: 6 | No duplicates
Result
Numbers: 7, 14, 23, 31, 38, 45
Dice Roll Simulation
Simulate two six-sided dice for games
Input
Range: 1-6 | Count: 2
Result
Roll: [4, 2] - Total: 6
Frequently Asked Questions
How truly random are these numbers?
We use the browser's crypto.getRandomValues() (Cryptographically Secure Random Number Generator) for true randomness. This is the same method used for security-sensitive applications, providing high-quality randomness suitable for games, selections, and general use.
Can I generate numbers without duplicates?
Yes, enable the 'No duplicates' option when generating multiple numbers. This ensures each number in your result set is unique, which is essential for lottery-style number generation.
What's the maximum range I can use?
The random number generator can handle ranges up to the JavaScript number limits. For practical purposes, ranges up to billions work reliably. For extremely large ranges, results may vary by browser.
Can I generate negative numbers?
Yes, you can set a negative minimum value. For example, a range of -10 to 10 would generate numbers from -10 through 10, including zero.
How do I simulate dice with custom number of sides?
Set your minimum to 1 and maximum to the number of sides (e.g., 20 for a 20-sided die). Set count to however many dice you want to roll. Enable sorting if you want results in numerical order.
Pro Tips
- •For raffles, keep the range exactly equal to the number of entrants for fairness
- •Record your generated numbers with timestamps in case of disputes
- •Use consistent ranges when doing random selection for audits or compliance
- •For password-like random numbers, consider using our Password Generator instead
- •When generating multiple numbers, check 'sort results' for easier reading