UUID Verifier - Check and Validate UUIDs

Verify and analyze any UUID. Check UUID validity, detect version, identify variant, and get detailed information about any UUID string.

Verify UUID

Verification Result

Enter a UUID above and click "Verify UUID" to check its validity and version.

About UUID Verification

A valid UUID follows the format xxxxxxxx-xxxx-Mxxx-Nxxx-xxxxxxxxxxxx where:

  • x = hexadecimal digit (0-9, a-f)
  • M = UUID version (1-7)
  • N = variant indicator (8, 9, a, or b for RFC 4122)

UUID Versions

Version 1: Timestamp-based UUID using MAC address and timestamp. Predictable but sortable.
Version 2: DCE Security UUID. Similar to v1 but with embedded POSIX UID/GID.
Version 3: Namespace name-based UUID using MD5 hashing. Deterministic output for same input.
Version 4: Random UUID using cryptographically secure random numbers. Most commonly used version.
Version 5: Namespace name-based UUID using SHA-1 hashing. Deterministic output for same input.
Version 6: Reordered timestamp UUID. Like v1 but with better sorting characteristics.
Version 7: Unix timestamp-ordered UUID. Newest standard with natural chronological sorting.

Need to generate new UUIDs? Use our UUID Generator.