🆔 UUID v7 Generator

📌 This tool has been merged into uuid generator. Please use the new version.
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Generate UUID v7

About UUID v7

UUID v7 is a Unix-timestamp-based UUID version（RFC 9562），The first 48 bits contain a millisecond timestamp, making UUIDs sortable by time. Compared to UUID v4 (random), v7 performs better in database indexes because time-ordered UUIDs reduce B+tree page splits.

Format：017F22E2-79B0-7CC3-98C4-DC0C0C07398F

48-bit timestamp + 4-bit version(7) + 12-bit variant + 62-bit random

FAQ

What is the difference between UUID v7 and v4?
UUID v4 is fully random, while v7 includes a timestamp for sorting. Using v7 as a primary key in databases provides better insert performance.

Is UUID v7 secure?
UUID v7 contains timestamp information that may leak generation time. Use UUID v4 if complete untraceability is needed.

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