UUID v1 (Timestamp & MAC) Generator & Decoder
Generate RFC 4122 Version 1 time-based unique identifiers with hardware node breakdown.
Execution runs 100% locally inside the browser sandbox using HTML5 Canvas, Web Cryptography Subtle API, and Web Workers. No data is ever transmitted across the network.
Zero network latency. Operates completely offline with zero dependencies on third-party backend servers or cloud services.
Built according to official RFC specifications, cryptographic test vectors, and enterprise-grade data transformation standards.
How to Use UUID v1 (Timestamp & MAC) Generator & Decoder
Click Regenerate to create a fresh time-based UUID.
View the embedded UTC timestamp, node MAC hash, and clock sequence.
Copy the UUID or generate batch lists of up to 100 UUIDs.
Frequently Asked Questions
What is the difference between UUID v1 and UUID v4?
UUID v1 is time-ordered and contains an embedded timestamp, whereas UUID v4 is completely random.
Is UUID v1 privacy-safe here?
Yes, the hardware node is generated with a multicast bit via Web Crypto CSPRNG to prevent device fingerprinting.
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