A UUID (Universally Unique Identifier), also known as a GUID (Globally Unique Identifier) in the Microsoft ecosystem, is a 128-bit number used to identify information in computer systems. Version 4 UUIDs are generated using cryptographic random numbers. The probability of generating a duplicate UUID v4 is so close to absolute zero that it can be ignored for all practical purposes. This makes them the ultimate choice for database primary keys, session IDs, and transaction identifiers in distributed systems where coordination is difficult.
Our generator allows you to create high-quality, cryptographically secure UUID version 4 strings instantly. You can generate a single UUID to copy to your clipboard, or bulk generate hundreds of them formatted as a JSON array or SQL insert statements for your testing environments.