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By default Jekyll version 3, ships with Rouge syntax highlighter. For some reason, you may want to disable it. For example, if you replace the built-in Rouge to another syntax highlighter such as Prism.js or your own custom highlighter.

To get Rouge disabled in Jekyll 3, just do the following.

  1. Open the _config.yml file located at the root directory of your Jekyll-based website.

  2. Add the following line:

highlighter: none

Now you have Rouge syntax highlighter disabled.

But this is not working with Jekyll-based websites that hosted on GitHub Pages. In this case, we need some trick with syntax_highlighter_opts. Instead of highlighter: none add the following lines:

markdown: kramdown
kramdown:
   syntax_highlighter_opts:
      disable : true

This will disable the syntax highlighting on GitHub Pages too.