yaml-mode.el helps you edit YAML .yml files.

Get it on http://github.com/yoshiki/yaml-mode

The subversion trunk is:


And also available as DebianPackage:yaml-mode.

It features font locking for data forms and comments, and some electric keys to help with block literals.

Original yaml-mode.el has incorrect regexp for YAML comments which makes it treat almost everything as comment (at least on my Emacs 23.0.60). This yaml-mode.el fixes it.

As of 2009/07/07, this yaml-mode.el also enforces spaces instead of TABs in yaml-mode, regardless of emacs configuration.

If you wish to have Return key automatically indent cursor on new line, add the following to emacs config:

(add-hook 'yaml-mode-hook (lambda () (define-key yaml-mode-map "\C-m" 'newline-and-indent)))


I wasn’t able to reach the above mentioned alternate version, but if you want to just fix the commenting issue, change:

(defconst yaml-comment-re "\\(#*.*\\)"


(defconst yaml-comment-re "\\(#.*\\)"


CategoryModes DataModes