UUID Variant 9 – Check RFC-Compatible UUID Variant Online

Local only

Demonstrate another accepted UUID variant nibble using the real validator.

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Waiting for input

Valid UUID v4

UUID variant inspection

Is a UUID with variant nibble 9 valid?

VetaTool accepts fourth-group variant nibbles from hexadecimal 8 through B. With a canonical UUID v4 and a fourth group beginning in 9, the real inspector returns Valid UUID v4. This tool is free to use. No account or payment is required.

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What you can do here

  • Canonical 8-4-4-4-12 UUID validation
  • UUID version inspection
  • RFC 4122 variant checking
  • Nil UUID recognition
  • Uppercase hexadecimal support
  • Browser-local validation

Steps

  1. Check the canonical UUID layout.
  2. Locate the first hexadecimal digit in the fourth group.
  3. Confirm the validator accepts 9 while still reporting the UUID version from the third group.

The accepted variant range spans four hexadecimal nibbles

The current inspector implements a numeric range check: variant must be at least 8 and at most 11, corresponding to hexadecimal 8, 9, A, and B.

That is why changing only the fourth-group first digit can change validity without changing the reported UUID version.

Variant nibble 9 example

The fourth group begins with 9 and the version nibble remains 4.

UUID input

550e8400-e29b-41d4-9716-446655440000

Validation result

Valid UUID v4

Common questions

Frequently asked questions

Does variant 9 mean UUID version 9?

No. UUID version comes from a different nibble in the third group. This example is still UUID v4.

Does this validate every RFC semantic rule?

No. VetaTool currently checks canonical text, version 1 through 8, and its RFC-compatible variant nibble range.

Recommended next steps

UUID RFC Variant 8Confirm that a fourth-group nibble of 8 is accepted by the current RFC-compatible variant check.UUID RFC Variant AInspect a canonical UUID whose fourth group starts with hexadecimal A.UUID Generator & Validator OnlineGenerate UUID v4 batches or validate canonical UUID format, version, and variant locally.

Debugging a specific UUID issue? Browse UUID troubleshooting.