Official x64dbg plugin for Binary Ninja.
From the Plugins Menu, select "Manage Plugins". Search for "x64dbgbinja" and click the "Install" button.
Import comments/labels from an uncompressed x64dbg JSON database in Binary Ninja.
Symbols for imported functions and or library functions can be overwritten via the "Overwrite X" entries in Settings.
Export comments/labels to a JSON database that can be loaded by x64dbg.
To export labels only: uncheck "Export Comments" under "x64dbg Database Export" in Settings.