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UUID Decoder

Decode and inspect UUIDs to extract version, variant, timestamp, clock sequence, and node information. Supports all UUID versions (1-7), Nil, Max, URN prefix, and braced formats. Runs entirely in your browser — your data never leaves your machine.

uuid decoder parser guid identifier rfc4122 rfc9562

Published May 29, 2026

All interactive tools run entirely in your browser. Your data never leaves your device.

How It Works

Paste any UUID and instantly see its version, variant, embedded timestamp (for v1/v6/v7), clock sequence, and node (MAC) address. The tool accepts standard, no-dash, URN-prefixed (urn:uuid:...), and braced ({...}) formats.

Features

  • Version detection: identifies versions 1 through 8, Nil (all zeros), and Max (all ones)
  • Timestamp extraction: decodes embedded timestamps from v1 (Gregorian), v6 (reordered Gregorian), and v7 (Unix epoch) UUIDs
  • Clock sequence & node: extracts clock sequence and node/MAC address from v1, v2, v6 UUIDs
  • Variant identification: NCS, RFC 4122/9562, Microsoft, or Future reserved
  • Format flexibility: accepts dashed, no-dash, uppercase, lowercase, URN prefix, braced
  • Canonical output: always shows the standard 8-4-4-4-12 lowercase form
  • Byte dump: raw hex byte representation for low-level inspection
  • 5 examples: Nil, Max, v1 (timestamp), v4 (random), v7 (Unix epoch)
  • Private: runs entirely in the browser — no data transmitted

Use Cases

  • Debugging distributed systems that use UUID identifiers
  • Extracting creation timestamps from v1/v6/v7 UUIDs
  • Verifying UUID version and variant compliance
  • Inspecting UUIDs from database records or API responses
  • Complementing the UUID Generator tool with decode/inspect capability