Generate random UUID v4 identifiers. Click to copy any UUID.
A UUID (Universally Unique Identifier) is a 128-bit identifier that is unique across time and space. UUID v4 is generated using random numbers, making collisions virtually impossible (1 in 2^122 chance). UUIDs are commonly used as database primary keys, API identifiers, session tokens, and distributed system IDs.
A standard UUID v4 looks like: 550e8400-e29b-41d4-a716-446655440000
It consists of 32 hexadecimal characters arranged in 5 groups separated by hyphens: 8-4-4-4-12.