UUID Validator
Validate a UUID, detect its version and variant, decode v1 timestamps. Instant, private.
✓ Valid UUID
Version
v4Variant
RFC 4122 (variant 1)Timestamp
—URN form
urn:uuid:550e8400-e29b-41d4-a716-446655440000UUID versions explained
A UUID (Universally Unique Identifier) is a 128-bit value represented as 32 hexadecimal characters in groups separated by hyphens. The "M" digit encodes the version: v1 is time-based (contains a 60-bit timestamp), v3 is MD5-hashed (namespace + name), v4 is random, v5 is SHA-1-hashed, v7 is Unix-ms sortable. The "N" nibble encodes the variant. For generating UUIDs in code, use crypto.randomUUID() (browsers) or the UUID Generator tool.
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