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UUID Generator

Generate, validate, and inspect universally unique identifiers

Time-based

UUID V1

6d5e8650-9c64-11f1-9323-75cfacede0b4
Random

UUID V4

26b1f1c8-389e-4507-8864-5acfd331f88f
Name-based

UUID V5

1ea31b31-fe2f-5728-85b0-1d1a3d1a0567

Batch Generator

Version

UUID Validator

Paste a UUID to check if it's valid and identify its version.

UUID Versions Explained

Version 1

Uses the current timestamp and MAC address. Guarantees uniqueness but may expose hardware identity.

Version 4

Purely random. The most commonly used version — simple, private, and virtually zero collision probability.

Version 5

Derived from a namespace + name using SHA-1. Deterministic: the same inputs always produce the same UUID.