Generate UUID v1 identifiers locally in your browser when you need values that include creation time and a node identifier. This tool is useful for legacy integrations, database imports, ordered fixtures, and systems that still expect RFC 4122 version 1 UUIDs.
When UUID v1 Helps
UUID v1 stores a timestamp, a clock sequence, and a 48-bit node value in a standard 36-character UUID string. That makes generated IDs roughly sortable by creation time while still fitting systems that accept ordinary UUID columns, URLs, logs, and API payloads.
Privacy And Node Identifiers
Classic UUID v1 generation used a real network card MAC address, which can expose hardware information. This tool starts with a locally administered random MAC address instead. You can enter a specific node value when matching a legacy system, but avoid using real hardware addresses in public samples or shared data.
Clock Sequence And Batch Generation
The clock sequence is a 14-bit value that helps avoid collisions when the same node generates IDs around the same time. Batch generation keeps all IDs in the same millisecond and increments the 100-nanosecond tick for each row, so every value in the result remains distinct.