Check out these must have mappings for working with JSON in Vim:
aj
provides a text object for the outermost JSON object, array, string, number, or keyword.gqaj
"pretty prints" (wraps/indents/sorts keys/otherwise cleans up) the JSON construct under the cursor.gwaj
takes the JSON object on the clipboard and extends it into the JSON object under the cursor.
There are also ij
variants that target innermost rather than outermost JSON
construct.
If you don't have a preferred installation method, I recommend installing pathogen.vim, and then simply copy and paste:
cd ~/.vim/bundle
git clone git://github.com/tpope/vim-jdaddy.git
Like jdaddy.vim? Follow the repository on GitHub and vote for it on vim.org. And if you're feeling especially charitable, follow tpope on Twitter and GitHub.
Copyright © Tim Pope. Distributed under the same terms as Vim itself.
See :help license
.