UUID Generator

Every UUID version from v1 to v7, with the trade-offs spelled out instead of assumed. Most generators only make v4, which quietly steers everyone toward the version that fragments database indexes — here v7 is one click away and the selector tells you why it is usually the better primary key. Name-based v3 and v5 get proper namespace and name inputs, so you can reproduce a deterministic UUID rather than guess at it. Generate one or a thousand, in upper or lower case, with or without hyphens, braced or as a URN. And paste any UUID you already have into the inspector to be told its version, its variant, and — for the time-based versions — exactly when it was created. Everything runs in your browser.

This tool does not use any data storage or network traffic.