This extension is a replacement for the subpar, standard Untabify command in Visual Studio. This command replaces all tabs in the selected lines, not just those at the beginning of the line. The correct tab size is maintained, so each line will look exactly as it did before.
Please note there is one change of functionality: If you have not selected multiple lines, this command will untabify the entire document. This means you don’t have to hit Ctrl A first to untabify every line.
This extension is open source. You can find the source here.