Random Number Generator

Generate secure random numbers with advanced options

Generate cryptographically secure random numbers between any range. Supports integers, decimals, negative numbers, and bulk generation with unique-value filtering.

0

Presets

Dice

Lottery

Supports decimals and negative numbers

Must be greater than minimum

Generate multiple numbers (1-100)

History

    No numbers generated yet

    How Random Number Generation Works

    Our random number generator uses the Web Crypto API(crypto.getRandomValues()), which provides cryptographically secure random values. Unlike Math.random(), which uses a deterministic pseudo-random number generator (PRNG), the Crypto API draws entropy from your operating system's hardware random number generator.

    This means the generated numbers are suitable for security-sensitive applications like generating passwords, tokens, or lottery numbers. The numbers cannot be predicted or reproduced, even if someone knows the exact time of generation.

    For integer generation, the algorithm uses Math.floor(random * (max - min + 1) + min) to ensure a uniform distribution across your chosen range. For floating-point numbers, the result is simply random * (max - min) + min, giving you a continuous uniform distribution.

    Frequently Asked Questions

    How does the random number generator work?

    The generator uses the browser's cryptographically secure crypto.getRandomValues() API to produce true random numbers. This method is more secure than standard pseudo-random number generators.

    Are the generated numbers truly random?

    Yes. A cryptographically secure pseudo-random number generator (CSPRNG) is used, which draws entropy from the operating system. The results are not predictable.

    Can I generate multiple random numbers at once?

    Yes, you can generate up to 100 numbers at once. Enable the 'Unique numbers only' option to avoid duplicate values.

    Does the generator support decimals and negative numbers?

    Yes, you can enter both decimal and negative numbers as minimum and maximum values. The generator automatically adapts the result to your chosen range.

    Can I export the history of generated numbers?

    Yes, you can export the history as a CSV file. Click the 'Export' button in the history section. The file includes timestamps and generated values.