Regex Editor & Tester

Matches a standard UUID/GUID string in the canonical 8-4-4-4-12 hexadecimal format (e.g., 550e8400-e29b-41d4-a716-446655440000), accepting both uppercase and lowercase hex digits. Commonly used to validate unique identifiers in web forms, API payloads, or database records. Note that while titled for UUID4, it validates the general UUID shape without enforcing version or variant bits.