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How to use UUID Inspector

Paste a UUID and the tool validates its format and reports the version (1-5), variant, and any embedded metadata such as the timestamp for version 1 UUIDs.

Frequently asked questions

How do I tell a UUID's version?

The version is the first character of the third group, so xxxxxxxx-xxxx-4xxx-... is a version 4 (random) UUID.

What is the UUID variant?

The variant bits (usually the '8', '9', 'a' or 'b' starting the fourth group) indicate the RFC 4122 layout the UUID follows.

Do all UUIDs embed a timestamp?

No — only version 1 (and time-ordered variants) embed a timestamp; version 4 UUIDs are random and carry no time information.

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