UUID vs GUID

UUID (Universally Unique Identifier) is standardized by RFC 4122. GUID (Globally Unique Identifier) is Microsoft's name for the same 128-bit structure. Most systems treat them interchangeably.

Minor formatting differences exist (braces, uppercase), but parsing libraries typically accept multiple variants. Use our UUID generator to create v4 or v7 identifiers suitable for databases and distributed systems.

Related tools

Try: UUID generator, UUIDv4 vs UUIDv7

FAQ

Is a GUID the same as a UUID?

Practically yes. GUID is the Microsoft term for a 128-bit identifier compatible with UUIDs defined in RFC 4122.

Are there formatting differences?

Some APIs include braces or uppercase letters for GUIDs; UUIDs are commonly lowercase without braces. The bytes are the same.