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Automagically highlight all your code blocks. 
This plugin uses highlight.js to detect and highlight “pre” HTML tags.
To color theme use the customizer: Appearance -> Customize -> Code Highlighting Theme

Awesome Code Highlighting

Automagically highlight all your code blocks.

Automattic

Alex Mills

Donncha O Caoimh (a11n)

Now with support for the new block editor in WordPress 5.0!
SyntaxHighlighter Evolved allows you to easily post syntax-highlighted code to your site without losing its formatting or making any manual changes. It uses the <a href="http://alexgorbatchev.com/wiki/SyntaxHighlighter" rel="nofollow ugc">SyntaxHighlighter JavaScript package by Alex Gorbatchev</a>.
For a live demo, see <a href="https://alex.blog/wordpress-plugins/syntaxhighlighter/" rel="nofollow ugc">this plugin’s homepage</a>.
For a list of supported languages (most widely used languages are supported), see the <a href="http://en.support.wordpress.com/code/posting-source-code/" rel="nofollow ugc">WordPress.com support document</a>.
Development of this plugin is <a href="https://github.com/Automattic/syntaxhighlighter" rel="nofollow ugc">on GitHub</a>. 
Translation of the plugin into different languages is on the <a href="https://translate.wordpress.org/projects/wp-plugins/syntaxhighlighter" rel="nofollow ugc">translation page</a>.
<a href="http://en.blog.wordpress.com/2009/12/02/better-source-code-posting/" rel="nofollow ugc">As seen on WordPress.com.</a>

SyntaxHighlighter Evolved

Just what I was looking for.
Thank you guys.

Perfect

I'm a longtime user of syntaxhighlighter evolved, so thanks for the excellent plugin!

The only downside I've recently experienced is the lack of bbPress integration, hence 4 stars rather than 5. If you need this for non-bbPress projects, this is a great choice.

longtime fan, but no bbpress support


It works and show code beautifully on pages, But if you copied that code and want to use it, the it shows errors, Looks like it add some spaces,



I tried it with php shorcode, and when i copied the code from the frontend of the page, It gives Parse error: syntax error, unexpected...


Works, But if you copy code and wan to to use it show error

Easily post syntax-highlighted code to your site without having to modify the code at all. As seen on WordPress.com.

Awesome Code Highlighting vs SyntaxHighlighter Evolved