Random Number Generator

Pick random integers between a minimum and maximum. Useful for dice, classroom picks, and quick samples. Not for cryptography—see the guide below for when to use a secure generator instead.

Minimum

Lowest possible value

Maximum

Highest possible value

Quantity

Numbers to generate

Pseudorandom vs secure random

Most browser random APIs are pseudorandom: good enough that each value in your range is roughly equally likely, but predictable if an attacker knows the internal state. That is fine for board games; it is not fine for session tokens or encryption keys.

Reference: MDN — Math.random()

What is a random number generator?

A random number generator produces unpredictable values within a range you define. Browser-based tools typically use pseudorandom algorithms suitable for games, contests, and sampling—not cryptography.

For security (passwords, tokens), use cryptographically secure methods instead of this tool.

How the calculation works

Set minimum and maximum bounds.
Choose how many numbers to generate.
Draw values uniformly from the range using a PRNG.
Display results for copy or share.

Worked examples

Raffle draw

Range: 1–100
Quantity: 1 winner

One integer selected—document the seed/time if auditability matters for formal contests.

Practical uses

•Classroom picks and team shuffles
•Board game mechanics
•Quick sampling for demos

Limitations

!Not cryptographically secure
!True randomness for high-stakes audits may need certified hardware or services

What is Random Number Generator?

A random number generator produces unpredictable numbers within a range you define. This tool uses your browser built-in generator to pick values between a chosen minimum and maximum, with optional settings for how many numbers to draw and whether repeats are allowed.

Generates uniform integers in your range using Math.random(). Results stay in your browser.

Last updated: July 27, 2026 · Published: January 15, 2024

How to Use This Tool

Set minimum

Enter the lowest integer in your range (e.g., 1 for a die).

Set maximum

Enter the highest integer (e.g., 6 for a standard die).

Choose quantity

Pick how many numbers to generate.

Generate and copy

Run the generator and copy results if needed.

Pro Tips

Use 1–6 for dice, 1–52 for card indices, 1–100 for percentage picks
For raffles, document the time and range you used
Do not use this tool for cryptographic keys or gambling audits
Math.random() is pseudorandom—patterns exist if the seed were known

Frequently Asked Questions

How random are the numbers?

The tool uses JavaScript Math.random(), which produces pseudorandom numbers with roughly uniform distribution in your chosen range. That is adequate for games, classroom picks, and casual sampling—not for cryptographic secrets.

What range can I use?

Set any minimum and maximum integers supported by the inputs. Very large ranges work, but remember Math.random() has finite precision.

Can I generate multiple numbers at once?

Yes. Choose how many values to draw. Decide whether duplicates are allowed based on your use case (sampling with vs without replacement).

Is this suitable for passwords or security tokens?

No. Use crypto.getRandomValues() or a password manager for security-sensitive randomness.

Is my data stored?

No. Generation runs locally in your browser.