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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.

Freemius

Abu Hayat

bPlugins

Charles Cormier

shehabulislam

Tanin Rahman

taninrahman21

#1 Plugin to Display Any Code Snippet Beautifully in WordPress’ at the top of the description.
<a href="https://bplugins.com/products/advance-custom-html/" rel="nofollow ugc">Advance Custom HTML</a> lets users display HTML, CSS, JavaScript, PHP, Python, or other code snippets within WordPress posts, pages, or widgets. With built-in live preview support, syntax highlighting, and code editor features, it’s designed for sharing code in a clean, readable, and responsive format.
This plugin includes a front-end code editor with a draggable preview panel, multiple syntax themes, and customizable settings for formatting and appearance. Ideal for tutorials, technical articles, and documentation, it provides a flexible way to embed and present code with real-time results.
<a href="https://bplugins.com/products/advance-custom-html/" rel="nofollow ugc">Advance Custom HTML</a> | <a href="https://bplugins.com/products/advance-custom-html/pricing/" rel="nofollow ugc">Pricing</a> | <a href="https://bplugins.com/support/" rel="nofollow ugc">Support</a> | <a href="https://bplugins.com/products/advance-custom-html/#demos" rel="nofollow ugc">Demo</a>
<h3>Free Features – Everything You Need to Start</h3>
<ul>
<li>
Edit code and preview output together on the editor/backend.
</li>
<li>
Live Output Preview: See the results of your code instantly
</li>
<li>
Autocomplete suggestions while writing code
</li>
<li>
Draggable Preview Panel to move output anywhere on screen
</li>
<li>
Set editor Font Size
</li>
<li>
Fully responsive, mobile-friendly interface
</li>
<li>
Lightweight and fast for better performance
</li>
</ul>
<h3>Pro Features – Unlock Advanced Controls</h3>
The <a href="https://bplugins.com/products/advance-custom-html/#pricing" rel="nofollow ugc">Pro version</a> offers extended customization and control over code presentation and layout.
What’s Included in Pro:
<ul>
<li>
Choose from 40+ editor themes (dark, light, minimal, etc.)
</li>
<li>
Adjust Tab size, line wrapping, editor height/width
</li>
<li>
Change syntax mode per snippet: HTML, CSS, JS, PHP, Python, and more
</li>
<li>
Toggle features: Copy button, Fold gutter, Highlight active line, etc.
</li>
<li>
Customize the Copy to Clipboard button text, icon, style, and position
</li>
<li>
Hide Headings or Labels for a clean, minimalist look
</li>
<li>
Hide or Show Line numbers to simplify code presentation
</li>
<li>
Enable or Disable Wrap to control line flow in your editor
</li>
<li>
Edit Code Editor/Snippet Height and Width, and align left, center, or right
</li>
<li>
Fold Gutter support for collapsing code blocks
</li>
<li>
Highlight Active Line Toggle for easier focus during tutorials
</li>
</ul>
<h3>How to Use – Step-by-Step Guide</h3>
<h4>Quick setup in just a few steps:</h4>
<ul>
<li>
Install the Advance Custom HTML
</li>
<li>
Open the editor for any post or page
</li>
<li>
Click Add Block and select Advance Custom HTML under Widgets
</li>
<li>
Write or paste your code
</li>
<li>
Customize the settings (theme, preview, copy button)
</li>
<li>
Publish or update the content
</li>
</ul>
<h3>Use Cases:</h3>
<ul>
<li>
Write and preview front-end HTML/CSS tutorials
</li>
<li>
Embed JavaScript snippets with instant results
</li>
<li>
Display PHP code in educational content
</li>
<li>
Show Python syntax in data science blogs
</li>
<li>
Publish developer documentation or API guides
</li>
<li>
Create interactive code articles with live editing
</li>
</ul>
<h3>Perfect For:</h3>
<ul>
<li>
Bloggers and Tech Writers
</li>
<li>
Coaches, Instructors, and Course Creators
</li>
<li>
Web Developers and Designers
</li>
<li>
Software Product Sites
</li>
<li>
Niche Tutorials & SaaS Startups
</li>
<li>
Business Sites with Technical Content
</li>
<li>
Anyone publishing HTML, JS, CSS, PHP, or Python code
</li>
</ul>
<a href="https://bplugins.com/products/advance-custom-html/#demos" rel="nofollow ugc">Live Demo</a> | <a href="https://bplugins.com/products/advance-custom-html/#pricing" rel="nofollow ugc">Buy The Pro</a>
<h3>Check out our other WordPress Plugins-</h3>
<a href="https://bplugins.com/products/html5-video-player/" rel="nofollow ugc">Html5 Video Player</a> – Display videos as single and playlist in multiple skins.
<a href="https://bplugins.com/products/pdf-poster/" rel="nofollow ugc">PDF Poster</a> – Display/Embed PDF files with different styles.
<a href="https://bplugins.com/products/html5-audio-player/" rel="nofollow ugc">Html5 Audio Player</a> – Listen audios with awesome visuals.
<a href="https://bplugins.com/products/streamcast-radio-player/" rel="nofollow ugc">StreamCast</a> – Customizable radio player with different skins.
<a href="https://bplugins.com/products/3d-viewer/" rel="nofollow ugc">3D Viewer</a> – Embed 3D models and 3D products with interaction.
<a href="https://bplugins.com/products/advanced-post-block/" rel="nofollow ugc">Advanced Post Block</a> – Show posts and custom posts in different layouts.

Advance Custom HTML – Show Live Code, Share Snippets, Embed Code, and Style Them Your Way.

Advance Custom HTML lets you write and display HTML, CSS, PHP, and other code snippets on WordPress with live preview and syntax highlighting.

Awesome Code Highlighting vs Advance Custom HTML – Show Live Code, Share Snippets, Embed Code, and Style Them Your Way.