SNTX - Textarea Syntax Highlighting
Extension Delisted
This extension is no longer available in the official store. Delisted on 2025-09-16.
Add syntax highlighting to textareas for editing code.

Instantly transform all textareas on the page into code editors with syntax highlighting. Just click the extension's button, and all of the textareas on the page will be displayed with syntax highlighting.
Also, Sntx will automatically add syntax highlighting to textareas in any Miva Merchant admin.
It currently supports 14 syntax highlighting themes: ambiance, blackboard, cobalt, eclipse, elegant, erlang-dark, lesser-dark, monokai, neat, night, rubyblue, twilight, vibrant-ink, and xq-dark.
It also supports four languages: HTML, CSS, JavaScript, and XML.
Special thanks to CodeMirror.net
More features to come!
This is my first Chrome extension, so I'm open to any improvements that you would like to offer. Please email me any comments, suggestions, or issues that you would like to share.
Happy Coding,
- Steven
Latest reviews
Amazing! could you add python?
So simple to use yet very functional
Doesn't seem to work with frames in the page.
Good ext, works fine. It's not bad to have code align feature like tidy, in future.
Very helpful.
Nice Plugin to highlight Test-Output of php-eval() Function
Needs more options (tabs size, tabs as spaces)
Super handy.
amazing! genius! such a great tool that makes coding so much easier
It's great the integration with Sublime-Text shortcuts. Such a good extension to edit complex wiki pages!