Generate a unique identifier (UUID v4).
A UUID (Universally Unique Identifier) is a 128-bit identifier that is unique across the world.
Format: xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx
Version: v4 (random-based)
Collision probability: Essentially zero (2^122 possibilities)
Widely used for database keys, API tokens, file names, and more.
Generate UUID v4. Bulk generation and copy supported.
Yes, 100% free. No signup required. All processing happens in your browser — no data is sent to any server.
Yes, all tools are fully responsive and work on smartphones, tablets, and desktops.