UUID v1 Generator
Generate a mock time-based UUID v1 string instantly — timestamp-style identifiers for testing and demos. Free, client-side UUID v1 generator.
🔒 100% Client-Side Processing
Your data is processed entirely in your browser and never transmitted to any server.
Common Use Cases
Testing time-ordered ID handling
Produce v1-format identifiers to verify systems that parse or sort by UUID version and timestamp fields.
Fixture variety
Mix v1-style IDs into test data for code that must accept multiple UUID versions.
Frequently Asked Questions
- How does UUID v1 differ from v4?
- v1 encodes a timestamp and traditionally a MAC address, making IDs sortable by creation time but potentially privacy-leaking; v4 is pure randomness. This tool creates a v1-formatted mock using the current time plus random bits.
- Why "mock" — is it not a real UUID v1?
- It follows the v1 layout (time fields and version bits) but fills the node segment with random data instead of a real MAC address — correct for testing formats and parsers, while leaking nothing about your hardware.
- Is my data private when I use this tool?
- Yes. This tool runs entirely in your browser using client-side JavaScript — nothing you type is transmitted to, logged by, or stored on any server. You can safely process confidential text, tokens, or code.