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UUID Validator

Check whether a value is a valid UUID and identify its version and variant.

Guide

Interactive workspace

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UUID Validator
Status
Valid UUID
Version
v4 — random
Variant
RFC 4122 / RFC 9562 (10xx)
Canonical form
550e8400-e29b-41d4-a716-446655440000
Detected input format
Hyphenated (8-4-4-4-12)

How to use it

  1. Paste the UUID string.
  2. Read the format result, version, and variant.
  3. Use the result as a syntax check only, not evidence that a record exists.
What is UUID Validator?

Check whether a value is a valid UUID and identify its version and variant.

How it works

SiteIndex checks the pasted value against the canonical UUID pattern, then reads its version and variant bits to report which UUID version produced it, if any.

Common uses
  • Confirm a value from a database or API is a well-formed UUID.
  • Identify which UUID version (v1, v4, v7, etc.) a value uses.
  • Catch a malformed identifier before it causes a downstream error.
Limitations
  • The format check does not establish uniqueness, randomness quality, database existence, or access permission.
Frequently asked questions
Does this check for uniqueness?
No. It only validates the format and structure of a single value; uniqueness cannot be verified without a database to compare against.

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