Andreas Hecht

Really simple to use and extrem lightweigt Code Highlighting with 8 different code highlighting themes. You can highlight your code with or without line numbers. It is based on Lea Verou’s <a href="http://prismjs.com/" title="Prism.js" rel="nofollow ugc">Prism.js</a>. Prism is used on several big websites like the Smashing Magazine, A list Apart, CSS Tricks, SitePoint and Drupal, because it is fast, simple and lightweight.
AH Code Highlighter supports PHP, HTML, CSS, JavaScript, Apache, HTTP, Sess, Lass, Markdown, Nginx, MySql, Xml, Mathml, JSON, Git, C, C# und C++ and more…
<h3>Demo</h3>
You can find a demo of the plugin on the plugin homepage: <a href="https://andreas-hecht.com/prism-syntax-highlighter/" title="AH Code Highlighter" rel="nofollow ugc">Plugin Homepage</a>
<h4>Basic Usage</h4>
Install and activate the plugin. Select your favorite Highlight Theme on the Options page (Settings => AH Code Highlighter). When you write a new post, click on the Code button, choose the code language and insert your code. Click OK and you’re done.

AH Code Highlighter

The easiest to use code highlighting ever. Choose between 8 different color themes to highlight your code snippets. Many programming languages are sup …

Dan D

Codeblocks Extended with PrismJS was born of a personal need for a lightweight code highlighter, with special functionality. 
Many of the other PrismJS based plugins in the repository were either outdated, or were lacking features that I was looking for.
Features:
<ul>
<li>Integrates the latest PrismJS build, with the most common langauges used.</li>
<li>Integrates the PrismJS line-numbers plugin, to automatically number lines of code.</li>
<li>Integrates the PrismJS line-highlight plugin to allow you to highlight specific lines of code.</li>
<li>Integrates ClipboardJS + custom jQuery to add a “Copy to Clipboard” button to each code block.</li>
<li>Custom Text Editor button to wrap selected text with the most commmon <code><pre></code> and <code><code></code> classes, and replacing special characters with their HTML safe equivalents.</li>
<li>Custom Visual Editor / TinyMCE dropdown button, with the most common languages to wrap selected text.</li>
<li>Since this works via wrapping <code><pre></code> and <code><code></code> tags with classes, you can use all custom class settings that PrismJS offers.</li>
<li>No shortcodes to mess with, so you don’t have to worry about losing whitespace between editor modes.</li>
<li>No settings page needed: Just activate it and go!</li>
</ul>
For a full list of languages supported and more information on this plugin’s use, please check out the FAQ.
Note: This does NOT auto-detect the language. Most plugins that do so brute force the languages or require file extensions, resulting in a much heavier plugin. The decision was made to keep this as light-weight as possible.
Note 2: This is designed to work with the Classic Editor. It does not currently work in Gutenberg blocks.
Thanks to Mike @ <a href="https://wp-bullet.com/" rel="nofollow ugc">WP Bullet</a> for the banner and icon.

Codeblocks Extended with PrismJS

Codebocks Extended with PrismJS includes syntax highlighting, copy to clipboard, and Visual + Text editor integration.

AH Code Highlighter vs Codeblocks Extended with PrismJS