UUID (Universally Unique Identifier), or Universally Unique Identifier, is a 128-bit number used to identify information in computer systems. It guarantees uniqueness over a vast range of time and space and is the most common ID generation scheme in distributed systems.

• Version 4 (Random):The most commonly used version. Generated based on high-quality random or pseudorandom numbers. This tool prioritizes the browser's built-in `crypto.randomUUID()` for maximum security.
• Version 1 (Time-based):Generated based on the current timestamp and the machine's MAC address. Guarantees uniqueness on the same machine.
• Version 3 (Namespace-based, MD5):Generated using an MD5 hash algorithm based on a 'namespace' UUID and a 'name' string. The same UUID is always generated for the same namespace and name.
• Version 5 (Namespace-based, SHA-1):Similar to v3, but uses the more secure SHA-1 hashing algorithm. This is the recommended method for name-based UUID generation.