MDX Formatter

Format and beautify MDX files with JSX components. Fix indentation, organize imports, and clean up your markdown.

Indent Size:

Preserve Frontmatter

MDX Input

Paste MDX and click Format

Clean MDX Code

Working with MDX files that mix markdown and JSX? Our formatter properly indents JSX components, preserves frontmatter, and cleans up inconsistent spacing to make your content files readable and maintainable.

JSX + Markdown

Why Use This Tool?

JSX Aware

Properly indents React/JSX components nested in your MDX.

Frontmatter Safe

YAML frontmatter is preserved exactly as written.

Smart Cleanup

Removes excessive blank lines and normalizes spacing.

Easy Export

Download formatted MDX or copy to clipboard instantly.

How this MDX Formatter works

Our MDX Formatter cleans and standardizes your MDX files by applying consistent formatting rules to both the Markdown content and embedded JSX components. The tool parses your MDX input, normalizes whitespace, fixes indentation in JSX blocks, and ensures proper spacing between content sections.

All formatting is handled client-side in your browser using JavaScript-based parsers. Your MDX content — including any proprietary component code or draft documentation — never leaves your device. This browser-based approach provides instant formatting without server round-trips or external dependencies.

The formatter handles frontmatter blocks, inline and block-level JSX components, code fences, import statements, and standard Markdown elements. It preserves your component props and expressions while applying readable indentation and consistent line breaks, making your MDX files cleaner for version control diffs and team collaboration.

How to use this MDX Formatter

Paste MDX

Enter your MDX content with frontmatter and components.

Configure

Set indent size and frontmatter preferences.

Format

Click format to beautify your MDX code.

Example Usage

Formatting a JSX component:

Input

<Alert type="info"> Message </Alert>

Output

<Alert type="info"> Message </Alert>

Frequently Asked Questions

What is MDX?

MDX is markdown enhanced with JSX, allowing you to use React components in your markdown documents.

Does it preserve frontmatter?

Yes! YAML frontmatter at the top of your document is preserved and properly formatted.

How are JSX components handled?

JSX components are properly indented based on their nesting level while preserving their attributes.

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The MDX Formatter is maintained by CodeItBro. We aim to provide the best free developer tools on the web. If you have feedback or suggestions, please visit our contact page.

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