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1100
Format

What is a UUID?

UUID (Universally Unique Identifier) is a 128-bit identifier used to uniquely label information in computer systems. Think of it as a digital fingerprint for data — each UUID is unique and generated without a central authority.

UUID Structure: A UUID is written as 32 hexadecimal digits separated by hyphens into 5 groups: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx. The version variant is encoded in specific bit positions.

Version Comparison

Common Use Cases

🗄 Database primary keys🌐 Distributed system IDs🌏 Session or resource identifiers📨 Message queue message IDs🧪 Test data and mocking