UUID Generator
Generate random UUIDs (v4) instantly. Create single or bulk UUIDs with one click.
What is a UUID?
UUID (Universally Unique Identifier) is a 128-bit identifier standard used to uniquely identify information. Version 4 UUIDs are generated using random numbers.
What is the difference between UUID and GUID?
UUID and GUID refer to the same concept. GUID (Globally Unique Identifier) is Microsoft's term for the UUID standard. They are functionally identical.
Are generated UUIDs truly unique?
UUID v4 uses random generation with 122 bits of randomness, making collisions extremely unlikely. The probability of a collision is about 1 in 2.71×10¹⁸.
What format are the UUIDs in?
UUIDs are generated in the standard 8-4-4-4-12 hexadecimal format (e.g., 550e8400-e29b-41d4-a716-446655440000) with optional braces or uppercase.