Advance Custom HTML – Show Off Code Snippets with Live Preview vs Prismatic

Share HTML, CSS, JavaScript, PHP, and Python snippets that readers can see, copy, and watch run live – right inside your posts and pages. Advance Custom HTML | Pricing | Support | Live Demo Why Advance Custom HTML? Plain code dumps are hard to read and impossible to interact with. Advance Custom HTML lets you display HTML, CSS, JavaScript, PHP, Python, and other code snippets in WordPress posts, pages, or widgets with built-in syntax highlighting, a clean code editor, and live preview support – so your readers see the code and the result side by side. The plugin includes a front-end code editor with a draggable preview panel, multiple syntax themes, and customizable settings for formatting and appearance. It is ideal for tutorials, technical articles, and documentation – a flexible, responsive way to embed and present code with real-time results. Free Features Edit Code with Live Preview: Write code and see the rendered output together in the editor. Live Output Preview: See the results of your code instantly. Autocomplete Suggestions: Get smart suggestions while writing code. Draggable Preview Panel: Move the output panel anywhere on screen. Editor Font Size: Set the font size that suits your content. Fully Responsive: Mobile-friendly code blocks and preview panels on every device. Lightweight and Fast: Built for performance so your pages stay quick. Pro Version – Unlock Advanced Controls The Pro version offers extended customization and control over code presentation and layout. Pro features include: Choose from 40+ editor themes (dark, light, minimal, and more). Adjust tab size, line wrapping, and editor height/width. Change syntax mode per snippet: HTML, CSS, JS, PHP, Python, and more. Toggle features: copy button, fold gutter, highlight active line, and more. Customize the Copy to Clipboard button text, icon, style, and position. Hide headings or labels for a clean, minimalist look. Show or hide line numbers to simplify code presentation. Enable or disable wrap to control line flow in your editor. Set the code editor/snippet height and width, and align left, center, or right. Fold gutter support for collapsing code blocks. Highlight active line toggle for easier focus during tutorials. How to Use – Quick Start Install and activate Advance Custom HTML. Open the editor for any post or page. Click Add Block and select Advance Custom HTML under Widgets. Write or paste your code. Customize the settings (theme, preview, copy button). Publish or update the content. Live Demo | Buy The Pro Use Cases HTML/CSS Tutorials: Write and preview front-end lessons with live results. JavaScript Demos: Embed snippets with instant, interactive output. PHP Education: Display PHP code cleanly in courses and articles. Data Science Blogs: Show Python syntax with proper highlighting. Developer Documentation: Publish API guides and reference docs. Interactive Articles: Create code content readers can explore with live editing. Perfect for bloggers, tech writers, instructors and course creators, web developers, software product sites, and anyone publishing HTML, JS, CSS, PHP, or Python code. Check out our other WordPress Plugins- Html5 Video Player – Display videos as single and playlist in multiple skins. PDF Poster – Display/Embed PDF files with different styles. Html5 Audio Player – Listen audios with awesome visuals. StreamCast – Customizable radio player with different skins. 3D Viewer – Embed 3D models and 3D products with interaction. Advanced Post Block – Show posts and custom posts in different layouts.

Display Beautiful Code Display beautiful code snippets with Prism.js, Highlight.js, or plain code escaping: Prism.js – Code escape + syntax highlight using Prism.js Highlight.js – Code escape + syntax highlight using Highlight.js Plain Flavor – Code escape without syntax highlighting 👉 The only 3-in-1 syntax highlighter! Live Examples Here are some live examples showing Prismatic displaying colorful code snippets: PHP highlighting CSS highlighting JavaScript highlighting HTML highlighting Escaped code without highlighting Prismatic is used to display thousands of code snippets on the above sites. Also here is a post showing some favorite Highlight.js styles 🙂 Prism.js Features Supports 60+ coding languages Choose from all 8 available Prism themes Provides a Gutenberg block for adding code snippets Provides TinyMCE/Visual buttons for adding code snippets Option to enable Prism plugin Line Numbers Option to enable Prism plugin Line Highlight Option to enable Prism plugin Show Language Option to enable Prism plugin Copy Code Button Option to enable Prism plugin Command Line Highlights code in post content, excerpts, and comments Detects language- and lang- class prefixes Limit syntax highlighting to Posts and Pages Highlight single-line and multi-line code Granular control over code escaping Smart loading of CSS & JS assets Support for ACF on single post views Highlight.js Features Supports 50+ coding languages Choose from all 90+ available Highlight themes Provides a Gutenberg block for adding code snippets Provides TinyMCE/Visual buttons for adding code snippets Customize the Highlight.js init JavaScript Highlights code in post content, excerpts, and comments Limit syntax highlighting to Posts and Pages Highlight multi-line blocks of code Detects language- and lang- class prefixes Enable support for no-prefix class names Granular control over code escaping Smart loading of CSS & JS assets Plain Flavor Features Enable code escaping for post content, excerpts, and/or comments Enable code escaping on the frontend, Admin Area, or both Provides a Gutenberg block for adding code snippets Provides TinyMCE/Visual buttons for adding code snippets Escapes single-line and multi-line code snippets Escapes tags (based on configuration) General Features Easy to set up and use Built with WordPress APIs Born of simplicity, no frills Squeaky clean, error-free code Lightweight, fast and flexible Focused on performance and security Loads CSS/JS assets only when required Adheres to HTML coding best practices Works with the Gutenberg Block Editor Regularly updated and “future proof” 👉 Prismatic escapes only the essentials to keep your code clean. 👉 Check out the screenshots for more details. Privacy This plugin does not collect or store any user data. It does not set any cookies, and it does not connect to any third-party locations. Thus, this plugin does not affect user privacy in any way. Prismatic is developed and maintained by Jeff Starr, 15-year WordPress developer and book author. Support development I develop and maintain this free plugin with love for the WordPress community. To show support, you can make a donation or purchase one of my books: The Tao of WordPress Digging into WordPress .htaccess made easy WordPress Themes In Depth Wizard’s SQL Recipes for WordPress And/or purchase one of my premium WordPress plugins: BBQ Pro – Blazing fast WordPress firewall Blackhole Pro – Automatically block bad bots Banhammer Pro – Monitor traffic and ban the bad guys GA Google Analytics Pro – Connect WordPress to Google Analytics Head Meta Pro – Ultimate Meta Tags for WordPress REST Pro Tools – Awesome tools for managing the WP REST API Simple Ajax Chat Pro – Unlimited chat rooms USP Pro – Unlimited front-end forms Links, tweets and likes also appreciated. Thank you! 🙂