Simple Syntax Highlighting (SSH), simple, clean and lighweight plugin to integrate highlight.js into WordPress. highlightjs has automatic language detection an turn on syntax highlighting. You just need to select text than press button or add the code into format. Credit: Highlight.js – https://highlightjs.org Line numbering plugin: https://github.com/wcoder/highlightjs-line-numbers.js Supports highlighting Java C HTML CSS PHP and more, up to 176 language, see: https://highlightjs.org/static/demo/ Instalation Download plugin Simple Syntax Highlighting archive, than unzip it. Upload the “simple-sintax-highlighting” folder to the “wp-content/plugins” directory. Activate the plugin through “plugins” menu in WordPress dashboard. Open menu: Setting > Simple Syntax Highlighting to configure. Screenshoot Plugin Settings Editor