Evan Solomon

Comment forms allow some HTML, this plugin extends that to let users type in <a href="http://daringfireball.net/projects/markdown/" rel="nofollow ugc">Markdown</a> and have it automatically converted to HTML. It also extends Markdown with a couple features made popular <a href="https://github.com/github/github-flavored-markdown" rel="nofollow ugc">by GitHub</a>. Conversion from Markdown to HTML is completely automated and doesn’t require anything on the commenter’s part.
The feature additions from GitHub are:
<ul>
<li>Single linebreaks are treated as new paragraphs</li>
<li>Code “fencing” with three backticks (“`)</li>
</ul>
Two notable features from GitHub’s Markdown implementation are missing:
<ul>
<li>To do lists: Doing these well would require some front end interaction, which I decided is outside the scope of this plugin at least for now</li>
<li>Repository autolinking (e.g. comments, issues, etc): These seemed a little too GitHub-specific.</li>
</ul>
GitHub-Flavored Markdown Comments is developed, unsurprisingly, <a href="https://github.com/evansolomon/wp-github-flavored-markdown-comments" rel="nofollow ugc">on GitHub</a>.

GitHub-Flavored Markdown Comments

WordPress plugin to let commenters use (GitHub-flavored) Markdown, and turn it into HTML.

wakalab

Markdown Renderer for GitHub transforms your WordPress content with beautiful GitHub Flavored Markdown (GFM) rendering. Perfect for technical blogs, documentation sites, and any content that needs professional code presentation.
Key Features:
🎨 Beautiful Syntax Highlighting 
* Powered by Shiki – the same syntax highlighter used by VS Code 
* Support for 100+ programming languages 
* Multiple beautiful themes (GitHub Light/Dark, VS Code themes, and more) 
* Automatic language detection
📊 Mermaid Diagram Support 
* Create flowcharts, sequence diagrams, and more 
* Professional diagram rendering 
* Interactive zoom functionality 
* Error handling with user-friendly messages
✨ GitHub Flavored Markdown 
* Tables, task lists, strikethrough 
* Automatic URL linking 
* Footnotes support 
* 100% compatible with GitHub markdown
📋 Copy Button Feature 
* One-click code copying 
* GitHub-style user experience 
* Full accessibility support 
* Mobile-friendly design
⚡ Performance Optimized 
* Asset lazy loading 
* Minimal performance impact 
* CDN-friendly architecture 
* Optimized for WordPress
🌍 Developer Friendly 
* Clean, semantic HTML output 
* Extensive hooks and filters 
* Translation ready (i18n) 
* WordPress coding standards
Perfect for: 
* Technical blogs and tutorials 
* Documentation websites 
* Code portfolios 
* Educational content 
* API documentation 
* Developer resources
<h3>Technical Requirements</h3>
<ul>
<li>WordPress 6.0 or higher</li>
<li>PHP 8.1 or higher</li>
<li>Modern browser with JavaScript enabled</li>
<li>Recommended: 128MB+ PHP memory limit</li>
</ul>
<h3>Support</h3>
For support, please visit the WordPress.org support forum for this plugin. Our team actively monitors and responds to support requests.
Before posting a support request: 
* Check the FAQ section above for common questions 
* Ensure you’re using the latest version of the plugin 
* Include your WordPress and PHP versions in your support request
Feature Requests: 
We welcome feature suggestions! Please post them in the support forum with detailed descriptions of your use case.
<h3>Source Code</h3>
This plugin uses build tools for development efficiency.
Compressed File Source Code: 
* build/index.js: WordPress Block Editor integration code 
 * Source: blocks/markdown/src/ folder 
 * Build: npm run build
Source Code Access: 
* GitHub Repository: https://github.com/wakalab/markdown-renderer-for-github 
* License: GPL v2 or later 
* Development Branch: main
Build Instructions: 
1. Install Node.js 18+ 
2. Install dependencies with <code>npm install</code> 
3. Build with <code>npm run build</code> 
4. Run tests with <code>npm run test</code>
Developer Resources: 
* Development Environment Setup: See CLAUDE.md and docs/DEVELOPMENT.md 
* Contributing: See CONTRIBUTING.md 
* Build Process Details: See BUILD.md
<h3>Third Party Services</h3>
This plugin operates entirely self-contained and does NOT use any external third-party services.
Complete Local Operation: 
* All JavaScript libraries are bundled locally within the plugin 
* Shiki syntax highlighter – served from your WordPress installation (no CDN) 
* Mermaid diagram renderer – served from your WordPress installation (no CDN) 
* No external API calls or network requests are made
Privacy & Security Benefits: 
* No data is transmitted to external servers 
* No tracking, analytics, or data collection 
* No external dependencies that could compromise your site 
* GDPR compliant by design 
* Works offline and in closed networks
All functionality is fully self-contained within your WordPress installation with no external service dependencies.
<h3>Privacy</h3>
This plugin does not collect any personal data. All processing is done locally on your server.
<h3>Credits</h3>
<ul>
<li>Syntax highlighting: <a href="https://shiki.style/" rel="nofollow ugc">Shiki</a></li>
<li>Diagram rendering: <a href="https://mermaid.js.org/" rel="nofollow ugc">Mermaid</a></li>
<li>Markdown parsing: <a href="https://markdown-it.github.io/" rel="nofollow ugc">markdown-it</a></li>
</ul>
<h3>Developer Information</h3>
Hooks and Filters: 
* <code>gfmr_metadata_saved</code> – Action fired when metadata is saved 
* <code>gfmr_metadata_get_metadata</code> – Filter the retrieved metadata
Plugin Development: 
This plugin follows WordPress coding standards and provides clean, semantic HTML output. All hooks and filters are properly documented within the plugin code.

Markdown Renderer for GitHub

Transform your WordPress content with beautiful GitHub Flavored Markdown rendering, syntax highlighting, and interactive diagrams.

GitHub-Flavored Markdown Comments vs Markdown Renderer for GitHub