Random Number Generator - Generate Random Numbers Online
Our Random Number Generator is a free online tool that generates random numbers within any specified range. Perfect for games, lotteries, decision making, statistical sampling, and programming purposes.
Features of Random Number Generator
Our tool comes packed with useful features:
- Custom range - Set any minimum and maximum values
- Multiple numbers - Generate up to 1000 numbers at once
- Unique numbers - Option to prevent duplicates
- Quick presets - 1-10, 1-100, 1-1000, Dice (1-6)
- Copy results - One-click copy to clipboard
- Client-side generation - Numbers generated in your browser
How Random Number Generation Works
Our generator uses JavaScript's Math.random() function combined with your specified range. The formula used is:
number = Math.floor(Math.random() * (max - min + 1)) + min
This ensures an even distribution across all possible values in your range.
How to Use Random Number Generator
- Set the minimum value - The lowest number in your range
- Set the maximum value - The highest number in your range
- Set quantity - How many numbers to generate
- Choose duplicate setting - Allow or prevent duplicate numbers
- Click Generate - Get your random numbers instantly
- Copy results - Use the Copy button to copy numbers
Quick Presets
| Preset | Range | Use Case |
|---|---|---|
| 1-10 | Small selections | Quick picks |
| 1-100 | Medium range | Percentages |
| 1-1000 | Large range | Big numbers |
| 1-6 | Dice | Game dice rolls |
FAQs About Random Number Generator
Are the numbers truly random?
They are pseudo-random, which is suitable for games and general use. For cryptographic purposes, use a dedicated cryptographic random generator.
Can I generate negative numbers?
Yes! Simply set the minimum value to a negative number.
What if I need more unique numbers than the range allows?
The tool will alert you if you try to generate more unique numbers than possible in your range.
Can I use decimals?
This tool generates integers only. For decimal numbers, generate integers and divide by a factor (e.g., divide by 100 for two decimal places).
Use Cases
- Games - Roll virtual dice, pick random players
- Lotteries - Generate lottery number combinations
- Giveaways - Pick random winners fairly
- Decision making - Random selection from options
- Testing - Generate random test data
- Sampling - Random sample selection for statistics
- Classroom - Pick random students for activities