UUID Decoder — Decode UUID Versions and Timestamps Online

Decode any UUID to see its version, variant, and structure. Shows whether it's time-based (v1), random (v4), or time-ordered (v7). Extracts the node identifier. 100% local.

Last updated: July 25, 2026

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Paste a UUID to decode its version, variant, and structure. See if it's time-based (v1), random (v4), or time-ordered (v7).

Version

Type

Random (v4)

Variant

Reserved

Node

44:66:55:44:00:00

What is UUID Decoder?

UUID (Universally Unique Identifier) version encodes metadata about how the UUID was generated. v1 encodes a timestamp and MAC address. v4 is fully random. v7 encodes a timestamp for sortability. This decoder extracts version, variant, and node information from any valid UUID.

How to decode a UUID

1Paste any UUID (with or without dashes).
2The version, type, variant, and node info appear automatically.

Frequently Asked Questions

How can I tell if a UUID is v1 or v4?

Check the 13th character: 1 = time-based (v1), 4 = random (v4), 7 = time-ordered (v7). Our decoder extracts this automatically.

Does v1 UUID contain a timestamp?

Yes — UUID v1 encodes the creation time as a 60-bit timestamp in 100-nanosecond intervals since October 15, 1582 (Gregorian calendar). Our decoder extracts and displays the time components.

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