Cryptographically secure UUID generation (v4, v7, v1, NIL). 100% browser-based, uses Web Crypto API, no data sent to server.
A UUID (Universally Unique Identifier) or GUID (Globally Unique Identifier) is a 128-bit number used to uniquely identify information in computer systems without requiring a central registration authority. UUID v4 uses cryptographically secure random numbers, making collision probability practically zero. UUID v7 includes a millisecond Unix timestamp prefix, enabling time-ordered primary keys ideal for database performance. This tool operates 100% locally in your browser using the Web Crypto API, guaranteeing complete privacy and zero server latency.