Mark Jaquith

This plugin allows you to compose content in Markdown on a per-item basis. The markdown version is stored separately (in the <code>post_content_filtered</code> column), so you can deactivate this plugin and your posts won’t spew out Markdown, because HTML is stored in the <code>post_content</code>, just like normal. This is also much faster than doing on-the-fly Markdown conversion on every page load. It’s only done once! When you re-edit the post, the markdown version is swapped into the editor for you to edit. If something external updates the post content, you’ll lose the Markdown version.
Note: this plugin assumes you’re using the Classic editor.

Markdown on Save

Allows you to compose content in Markdown on a per-item basis. The markdown version is stored separately, so you can deactivate this plugin any time.

Floris-Jan

Simple Markdown is a lightweight WordPress plugin that adds a custom Gutenberg block for rendering Markdown content directly in your posts and pages. Perfect for developers, writers, and anyone who prefers writing in Markdown format.
NEW in 1.3.0: Professional Code Beautification 
* Automatic code formatting and indentation for all supported languages 
* Professional copy buttons positioned as elegant tabs outside code blocks 
* Language-aware beautification (JavaScript, PHP, CSS, JSON, Bash) 
* Smart preservation of ASCII art and tree structures in copy-only blocks
Core Features:
<ul>
<li>Custom Gutenberg block for Markdown content</li>
<li>Support for common Markdown syntax:
<ul>
<li>Headers (H1-H6)</li>
<li>Bold and italic text</li>
<li>Inline code and code blocks with copy functionality</li>
<li>Links</li>
<li>Unordered and ordered lists</li>
<li>Blockquotes</li>
</ul>
</li>
<li>Professional code block rendering with:
<ul>
<li>Automatic beautification and proper indentation</li>
<li>One-click copy functionality with visual feedback</li>
<li>Language labels (JavaScript, PHP, CSS, JSON, Bash)</li>
<li>Tight line spacing optimized for code readability</li>
</ul>
</li>
<li>Clean HTML output with semantic markup</li>
<li>Theme-resistant styling with robust CSS overrides</li>
<li>Easy to use interface</li>
</ul>
This is the core version with all essential markdown features plus professional code handling. A Pro version with syntax highlighting and other advanced features will be available in the future.
Supported Markdown Syntax:
<ul>
<li><code># Header 1</code> through <code>###### Header 6</code></li>
<li><code>**bold text**</code> and <code>*italic text*</code></li>
<li><code>`inline code`</code> and code blocks with triple backticks</li>
<li><code>[link text](URL)</code> for links</li>
<li><code>- item</code> for unordered lists</li>
<li><code>1. item</code> for ordered lists</li>
<li><code>> quote</code> for blockquotes</li>
</ul>
Advanced Code Block Syntax:
<ul>
<li><code>```javascript copy</code> – Beautified JavaScript with copy button</li>
<li><code>```php copy</code> – Beautified PHP with copy button</li>
<li><code>```css copy</code> – Beautified CSS with copy button</li>
<li><code>```json copy</code> – Beautified JSON with copy button</li>
<li><code>```bash copy</code> – Bash commands with copy button</li>
<li><code>```copy</code> – Copy button without beautification (preserves ASCII art)</li>
<li><code>```</code> – Plain code block (no beautification, no copy button)</li>
</ul>

Simple Markdown

Simple and fast plugin to render markdown with a custom Gutenberg block. Professional code beautification and copy functionality included.

Markdown on Save vs Simple Markdown