Generate unique identifiers (UUID v4) instantly
UUID (Universally Unique Identifier) is a 128-bit number used to identify information in computer systems. This tool generates UUID v4, which uses random numbers for maximum uniqueness.
UUID (Universally Unique Identifier) is a 128-bit unique identifier. UUID v4 uses random number generation with extremely low collision probability, suitable for database primary keys or unique identifiers in distributed systems.
UUID v4 has an extremely low collision probability of approximately 1/2^122. Even generating 1 billion UUIDs per second, it would take about 85 years to have a 50% chance of a single collision.
Yes, but performance considerations apply. Advantages: globally unique, no centralized generation needed. Disadvantages: larger storage (16 bytes), worse index performance than auto-increment IDs. Consider UUID v7 (time-sorted) or ULID.
Essentially no difference. UUID is the standard term (RFC 4122), while GUID is Microsoft's terminology (Globally Unique Identifier). They refer to the same thing.