GUID vs UUID

Compare GUID and UUID naming, formats, versions, and common use cases.

Comparison

GUID and UUID usually refer to the same 128-bit identifier format. UUID is the standards term; GUID is common in Microsoft tools and databases.

GUID

Common in .NET, SQL Server, Windows APIs, and Azure docs.

UUID

Common in RFCs, JavaScript packages, databases, and API docs.

Use UUID v4 for random IDs. Use UUID v7 when new IDs should sort roughly by creation time.

Check An ID

Related tools

GUID Generator

Generate UUID v4 or v7 values and validate existing IDs

UUID Validator

Check UUID format, version, variant, and normalized output

UUID v4 / v7 Generator

Generate random UUID v4 values or time-ordered UUID v7 values