External applications

By default FreeFileSync opens the operating system's standard file browser on each mouse double-click by invoking "explorer /select, "%item_path%"" on Windows and "xdg-open "%item_folder%"" on Linux.

However you are free to integrate other external applications into FreeFileSync: navigate to "Menu -> Advanced -> Global settings: External Applications" and add or replace a command string. The first entry is executed when double-clicking a row on main grid while all other entries are only available via right-click context menu. The following internal macros may be used:

%item_path%     - full file or folder name
%item_folder%   - folder part only
%item2_path%    - Other side's counterpart to %item_path%
%item2_folder%  - Other side's counterpart to %item_folder%

Examples:

• Start visual difference tool:
  "C:\Program Files\WinMerge\WinMergeU.exe" "%item_path%" "%item2_path%"
   

• Show file in Windows Explorer:
  explorer /select, "%item_path%"
   

• Open file in associated application:
  cmd /c start "" "%item_path%" or simply "%item_path%"
   

• Open console dialog:
  cmd /k cd /D "%item_folder%"
   

Note
Don't forget to use quotation marks if file names contain spaces!