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The book speaks for itself: if it brings you joy, my dear reader, I'm rewarded;
if not, I'll say you goodbye with a flick of my fingers.
– Machado de Assis

This wiki is being rewritten from scratch.

Visit the new pages for utilities and codecs.

Recommended readings

• What is a UUID? (watch the video)
• How to Do UUID as Primary Keys the Right Way
• The Wild World of Unique Identifiers (UUID, ULID, etc)
• Random UUID as a Primary Key in the Relational Database
• Analyzing New Unique Identifier Formats (UUIDv6, UUIDv7, and UUIDv8)
• Do you intend to use UUID as PK instead of Int/BigInt in your database? Think again... (in Portuguese)

Recommended videos

• Generating Unique Identifiers in Your Programs (GUIDs/UUIDs)