Random Number Generator
Generate one or thousands of random numbers instantly. Set your range, choose integers or decimals, and control duplicates — all free and private.
Free Random Number Generator
The SmarterSources Random Number Generator lets you create random numbers for any purpose. Whether you need a single number for a raffle, a list of random integers for a statistics assignment, or thousands of decimals for simulation data, this tool handles it all instantly. Set your minimum and maximum values, choose how many numbers you need, and click generate.
How It Works
This generator uses JavaScript's built-in Math.random() function to produce pseudorandom numbers within your specified range. For integer mode, values are uniformly distributed across the entire range including both endpoints. For decimal mode, numbers are generated with your chosen precision. When duplicates are disabled, the generator ensures every number in the result set is unique.
Common Use Cases
Lotteries and raffles: Generate a random winning number or pick random ticket numbers from a range. Disable duplicates to ensure each number is unique.
Statistics and sampling: Create random samples for homework, research, or data analysis. Generate large sets of numbers and export them as CSV for use in spreadsheets or statistical software.
Games and decision-making: Roll virtual dice, pick random player orders, or make random selections when you need an unbiased choice.
Education: Teachers can generate random numbers for math exercises, probability demonstrations, or quiz question randomization.
Software testing: Developers can generate random test data to verify that applications handle diverse numeric inputs correctly.
Privacy and Security
This random number generator runs entirely in your web browser. No numbers are sent to any server, no data is logged, and no cookies are set. Your generated numbers remain completely private on your device. You can use this tool offline once the page has loaded.
Frequently Asked Questions
Are the random numbers truly random?
This generator uses JavaScript's Math.random(), which produces pseudorandom numbers. The results are statistically random enough for games, sampling, raffles, and general-purpose use. For cryptographic applications such as password generation or encryption keys, a cryptographically secure random number generator (CSPRNG) should be used instead.
Can I generate random numbers without duplicates?
Yes. Turn off the "Allow Duplicates" toggle to generate a set of unique random numbers. When generating unique integers, the number of values you request cannot exceed the size of your range. For example, if your range is 1 to 10, you can generate at most 10 unique integers.
What is the maximum number of random numbers I can generate?
You can generate up to 10,000 random numbers at a time. All generation happens in your browser, so performance depends on your device. Most modern computers and phones handle 10,000 numbers instantly.
Can I generate random decimal numbers?
Yes. Toggle off "Integers Only" to switch to decimal mode. You can then specify the number of decimal places, from 1 to 10. This is useful for generating test data, simulation inputs, or any scenario where fractional values are needed.
Is my data private when using this tool?
Yes. This random number generator runs entirely in your browser using JavaScript. No data is sent to any server, no cookies are stored, and nothing is tracked. Your generated numbers never leave your device.