FNV-1a Hash

Fast non-cryptographic hash function.

Code

Utilities

let hash = 2166136261;
for (let i = 0; i < str.length; i++) {
  hash ^= str.charCodeAt(i);
  hash = Math.imul(hash, 16777619);
}
return (hash >>> 0).toString();

Parameters

str(string)

String to hash.

Browser·fetch() may be limited by CORS

More JavaScript Snippets

Constant Time Compare

Compare two strings in constant time to prevent timing attacks. Unlike === which returns early on first mismatch, this compares all characters regardless of where differences occur.

Generate Password

Generate a cryptographically secure random password with configurable options.

Hash SHA-256

Generate a SHA-256 hash of a string. SHA-256 produces a fixed 64-character hexadecimal output regardless of input size.

Parse JWT Payload

Extract and decode the payload from a JWT token without verification. Useful for reading claims like user ID, expiration time, and roles from tokens.

Simple String Hash

Generate a simple numeric hash from a string.

XSS Attack Prevention

Escape HTML entities to prevent Cross-Site Scripting attacks.