Universally unique identifier

lastmod 2026-02-23created 2015-02-2715 edits

A universally unique identifier (UUID) is an identifier standard used in software construction, standardized by the Open Software Foundation (OSF) as part of the Distributed Computing Environment (DCE).

See also

• UUIDv4 - The commonly used method
• UUIDv7
• Randflake ID - Distributed, uniform, unpredictable, unique random ID generator
• UUIDv47 - Store as UUIDv7 in the database, expose as UUIDv4 externally

Resource IDs: GUID or sequential?

See Globally unique identifier#Resource IDs: GUID or sequential?.

See also

• GUID
• Serial number
• Disk UUID
• Product key
• Uniform Resource Name (URN)
• Universally Unique Lexicographically Sortable Identifier (ULID)
• Snowflake ID - A way to create identifiers useful in large-scale distributed processing systems
• nanoid

Favorite site

• Wikipedia (en) Description of UUID
• What to make IDs with - YouTube - sequence/auto-increment/UUID/UUIDv7/Snowflake ID