Tip: Click the Copy button or select and press Ctrl/Cmd+C.

About UUID versions

v1 (time-based): Includes timestamp, clock sequence, and node identifier. Allows optional custom clock sequence and node (hex, 12 chars). Good for sortable IDs but may leak timing info.

v4 (random): Uses cryptographically strong random values. Most common and safe for general purpose identifiers.

v5 (name-based, SHA-1): Deterministic based on a namespace UUID and a name string. Same inputs always produce the same output.