Random Number Generator

The generator uses the Web Crypto API (crypto.getRandomValues) when available, providing cryptographically secure pseudorandom numbers. This is suitable for most use cases including cryptographic key generation and security applications.

When unique mode is enabled, each generated integer will be different. If the range (max - min + 1) is smaller than the count, an error is shown since unique values aren't possible. This only works with integer numbers, not decimals.

The generator supports any integer range within JavaScript's safe integer limits (±9,007,199,254,740,991). For practical use, ranges from -1,000,000 to 1,000,000 work instantly. For unique numbers, the range must be larger than or equal to the count you request — otherwise the tool shows an error.

There's no hard limit, but generating millions of numbers at once may cause browser performance issues. For unique integers, the count must be ≤ (max - min + 1). For practical use, batches of up to 10,000 numbers generate nearly instantly. For very large batches, consider generating in smaller chunks.

The generator uses cryptographically random values from the Web Crypto API, which cannot be seeded. If you need reproducible random sequences (e.g., for testing or procedural generation), use a seeded PRNG library in your own code instead — this tool provides true randomness, not deterministic pseudo-randomness.

Decimal numbers are displayed with 4 decimal places. The underlying random value uses the full 32-bit range from the crypto API, giving high precision within the specified min-max range.