“tidify” a json in vim

If you have to edit json files from vim, you may want to make them more readable, here is how you can do this:

start by installing the JSON::XS perl module from the CPAN

sudo cpan JSON::XS

then, edit your .vimrc and add the following

map jt :%!json_xs -f json -t json-pretty

now while editing a json file, you can hit ,jt (or whatever your is set to) and tidify a json.

source: http://lumberjaph.net/blog/index.php/2009/02/17/tidify-a-json-in-vim/