Align UV is a tool for organizing UV layouts by straightening faces and edges to the XY axis. It operates within the UV Editor in either face or edge mode. Users can align selected faces to uniform square grids or utilize edge-length scaling to preserve original proportions. The addon includes support for pinned vertices, allowing users to lock specific points in place while aligning the rest of the selection. It also features options for straightening edge sequences between fixed start and end points without altering unselected faces. The tool integrates into the right-click context menu and supports live sync mode.