Random Number Generator

About This Tool

What is a Random Number Generator?

A random number generator (RNG) is a tool that produces numbers with no predictable pattern. Our free online tool uses your browser's built-in Math.random() function to generate integers or decimal values instantly within any range you define.

Unlike dice or physical randomizers, a software RNG can produce large quantities of numbers in milliseconds, handle arbitrarily large ranges, and enforce constraints like uniqueness — making it indispensable for developers, statisticians, educators, and anyone who needs unbiased numerical data.

All generation happens client-side in your browser. No numbers are sent to any server, logged, or stored. Your outputs stay entirely on your device.

🎮

Games & Giveaways

Pick lottery numbers, raffle winners, or random dice rolls for tabletop games.

🧪

Testing & Development

Generate test data, random IDs, sample inputs, or seed values for algorithms.

📊

Statistics & Sampling

Create random samples from a population range for statistical experiments.

🔢

Education

Generate math problems, quiz values, or demonstrate probability distributions.

How To Use

Start in seconds

// no signup, no install — just configure and generate.

Set Min & Max

Enter your desired minimum and maximum values. The generator will pick numbers within this range inclusively.

Choose Count

Set how many numbers you need — from 1 up to 20 at a time. All will be shown as a comma-separated list.

Toggle Options

Enable Decimals for floating-point output, or Unique Only to ensure no repeated values in bulk generation.

Generate & Copy

Click Generate (or press Enter). Copy the result to your clipboard with one click.

FAQ

Frequently asked questions

Any numeric range your browser supports. You can use negative numbers, zero, decimals in the min/max fields, and ranges spanning millions.

They use Math.random(), which is a pseudorandom number generator (PRNG). It's statistically uniform and suitable for games, sampling, and testing — but not for cryptographic security.

When enabled with Count > 1, each number in the output will appear only once — similar to drawing numbered balls from a bag without replacement.

Yes. Enable the Decimals option and the generator will produce numbers with two decimal places within your specified range.

You can generate up to 20 numbers per click. For larger datasets, click generate multiple times and combine the results.

What is a Random Number Generator?

Start in seconds

Frequently asked questions

More free tools