Random Number Generator
Generate random numbers with customizable ranges, quantity, and formatting options.
Include min and max values in results
Allow the same number to appear multiple times
Sort generated numbers in ascending order
About Random Number Generator
Our Random Number Generator is a powerful tool that allows you to generate random numbers with customizable options. Whether you need random integers, decimals, or a specific range of numbers, this tool has you covered.
Customizable Ranges
Set your own minimum and maximum values, including negative numbers and decimals.
Integers or Decimals
Generate whole numbers or decimal values with configurable precision.
Unique or Duplicate
Choose whether to allow duplicate numbers or ensure each number appears only once.
Privacy First
All processing happens in your browser. Your data never leaves your device.
How to Use
- Set your range: Enter the lowest and highest numbers for your desired range.
- Choose number type: Select between integers (whole numbers) or decimals.
- Configure options: Set quantity, decide whether to include limits, allow duplicates, and sort numbers.
- Select output format: Choose between one-line output with a custom separator or separate lines.
- Generate numbers: Click the "Generate Numbers" button to create your random numbers.
- Use the results: Copy or download the generated numbers for your needs.
Common Use Cases
Statistical Analysis
Generate random samples for surveys, research studies, and data analysis to ensure unbiased results.
Gaming Applications
Create random events, dice rolls, card shuffles, and other game mechanics that require randomness.
Lottery and Drawings
Generate random numbers for lotteries, raffles, giveaways, and contest winner selection.
Test Data Generation
Create random test data for software testing, database population, and system performance evaluation.
Frequently Asked Questions
A random number generator is a tool that produces numbers in a range that cannot be reasonably predicted better than by random chance. Our tool uses JavaScript's Math.random() function to generate random numbers within your specified parameters.
Integers are whole numbers without decimal points (like 1, 42, or -7). Decimals (or floating-point numbers) include decimal points (like 3.14, -0.5, or 2.71828). Our tool can generate both types depending on your needs.
When you check 'Include limits', the random numbers generated can include the lowest and highest values you specified. If unchecked, the generated numbers will be strictly between your minimum and maximum values, excluding those exact values.
Preventing duplicates ensures each random number appears only once in your results. This is useful for applications like lottery drawings, selecting unique winners, or creating test data where repetition would be problematic.
You can generate up to 100 numbers at once with our tool. However, when generating unique numbers (no duplicates), the maximum is limited by your range size. For example, if you're generating unique integers between 1 and 10, you can't generate more than 10 numbers.
All random number generation happens entirely in your browser. Your parameters never leave your device, ensuring complete privacy and security. This also means you can use the tool offline once the page has loaded.
Yes, you can use negative numbers, decimals, or a combination of both for your minimum and maximum values. For example, you can generate random numbers between -10.5 and 20.75.
The numbers are generated using JavaScript's Math.random() function, which provides pseudo-random numbers suitable for most applications. While not cryptographically secure, they are random enough for general purposes like games, simulations, and statistical sampling.
Technical Details
Our random number generator uses JavaScript's built-in Math.random() function, which implements a version of the xorshift128+ algorithm. This provides high-quality pseudo-random numbers suitable for most applications.
// Example of how random integers are generated
const min = 1;
const max = 100;
const randomInt = Math.floor(Math.random() * (max - min + 1)) + min;