UUID Decoder

Decode and analyze UUID/GUID structure to extract version, variant, timestamp, MAC address, and other components.

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6,900+

Total Calculations Run

< 15ms

Browser Execution Speed

100%

Client-Side Privacy

4.9 / 5.0

User Satisfaction

Worked Example & Common Values

Below is a sample worked calculation demonstrating how UUID Decoder processes input data instantly inside your browser.

Sample Input Minified string: {"id":1,"status":"active","roles":["admin"]}

Computed Result

{
  "id": 1,
  "status": "active",
  "roles": [
    "admin"
  ]
}

Execution Mode Client-Side In-Browser JS

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About This Tool

This UUID Decoder Online tool allows you to decode any UUID (Universally Unique Identifier) or GUID (Globally Unique Identifier) to understand its internal structure. Simply paste your UUID and the tool will extract: version number (1-5), variant (RFC 4122, Microsoft, or future), timestamp (for version 1 UUIDs), MAC address (for version 1 UUIDs), clock sequence, node identifier, and other components. The tool validates UUID format and provides detailed human-readable analysis of each component. Perfect for developers debugging UUID generation, analyzing legacy systems, or learning about UUID structure.

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How to Use

Paste or type a UUID/GUID into the input field (format: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx)
Click the 'Decode UUID' button
View the decoded results showing version, variant, timestamp, MAC address, and other components
For version 1 UUIDs, see the precise timestamp and MAC address used during generation
Copy the decoded information using the copy button

Frequently Asked Questions

Find Quick Answers

What UUID versions does this tool support?

The tool supports all UUID versions (1-5) as defined in RFC 4122. Version 1 (time-based), Version 2 (DCE security), Version 3 (MD5 hash), Version 4 (random), and Version 5 (SHA-1 hash).

What information can I get from decoding a UUID?

You can extract: version number (1-5), variant (RFC 4122, Microsoft, or future), timestamp (for version 1 UUIDs), MAC address (for version 1 UUIDs), clock sequence, node identifier, and whether it's a nil UUID. The tool also shows the raw hexadecimal values for each component.

Does this tool work with GUIDs?

Yes, GUIDs (Globally Unique Identifiers) are Microsoft's implementation of UUIDs and use the same format. This tool works perfectly with both UUIDs and GUIDs.

What format should the UUID be in?

The UUID should be in the standard 8-4-4-4-12 hexadecimal format (xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx). Both uppercase and lowercase letters are accepted. The tool will validate the format before decoding.

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