You probably know that we can use something like
:%!python -m json.tool to format a JSON file that’s opened in Vim. However, I always find this command hard to recall. Instead of dedicating a mapping for this, we can actually rely on
equalprg instead. Let’s set this
augroup vimrc autocmd! autocmd FileType json setlocal equalprg=python\ -m\ json.tool augroup END
Now, when we open a JSON file, we can use the familiar
= key to format it nicely.