How random are the generated numbers?

The generator uses JavaScript's Math.random() which produces pseudo-random numbers. While not cryptographically secure, they're sufficiently random for games, simulations, and sampling. For cryptographic purposes, use a dedicated secure random generator.

What does 'unique numbers' mean?

When enabled, each generated number will be different. For example, generating 5 unique numbers from 1-10 will never repeat a number. This is useful for lottery-style drawings or sampling without replacement.

How many unique numbers can I generate?

For integers, the maximum is the range size (max - min + 1). For decimals, it's limited to 100,000 to prevent browser freezing. If you request more than possible, the generator will produce the maximum available.

Can I generate negative numbers?

Yes. Set a negative minimum value. For example, min: -10, max: 10 will generate random numbers between -10 and 10, including negative numbers.

What's the difference between integers and decimals?

Integers are whole numbers (1, 2, 3). Decimals include fractional parts (1.5, 2.73). You can control the number of decimal places (1, 2, or more). Integers are faster and better for games; decimals are better for simulations.

Is the generation truly random?

Computer random numbers are 'pseudo-random' - they appear random but are generated by an algorithm. For most purposes (games, sampling, simulations), this is sufficient. For cryptography or gambling, use specialized secure random generators.

Tools

Min Value

Max Value

Count

Allow Decimals

Unique

Random Number Generator — Generate Numbers in Range

Free random number generator to generate random numbers within a custom range. Support for unique numbers, decimals, and multiple distributions. Perfect for games, sampling, and simulations. All generation runs locally in your browser.

Features

✓Generate random numbers within a custom range
✓Support for integers and decimals
✓Generate multiple numbers at once
✓Option for unique (non-repeating) numbers
✓Control decimal places for floats
✓Instant generation with one click
✓Perfect for games, raffles, and sampling
✓Useful for statistical simulations
✓No bias in number distribution
✓All generation runs locally in your browser

How to Use

1Enter the minimum value of the range.
2Enter the maximum value of the range.
3Choose how many numbers to generate.
4Select whether to allow decimals.
5Enable unique numbers if needed.
6Click generate to get your random numbers.

Frequently Asked Questions

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