Emacs mode to edit JSON

Question

Does anybody know a good Emacs mode to edit JSON? An app I am working on uses a JSON based communication protocol and having the data nicely indented and syntax-highlighted woul

Answer 1

I will also second Josh's json-mode, but also recommend flymake-json as an addition. It helps highlight syntax errors.

I don't like using python -mjson.tool because it reorders items in JSON objects. I find (prog-indent-sexp) works just fine to reindent, and using jsonlint instead of python -mjson.tool works for pretty printing/reformatting in beautify-json

(eval-after-load "json-mode"
  '(progn
     (require 'flymake-json)
     ;; flymake-cursor displays error in minibuffer message area instead of requiring hover
     (require 'flymake-cursor)

     (add-hook 'json-mode-hook 'flymake-json-load)
     (define-key json-mode-map "\C-c\C-n" (function flymake-goto-next-error))
  )
)