Markdown Diff Tool - Compare Markdown Files Online

Compare Markdown documents with text and rendered preview diff. Line-by-line changes highlighted. Perfect for documentation review. Free and private.

Original Markdown

Modified Markdown

Ignore whitespace

Ignore case

Show line numbers

Show inline word changes

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Frequently Asked Questions

Markdown diff compares two Markdown documents and highlights differences at both the source text level and rendered HTML preview level. This helps you see what changed in the raw syntax and how those changes affect the final output.

Use this tool when reviewing documentation changes, comparing wiki edits, checking pull request modifications, tracking article revisions, or merging conflicting Markdown files. It's perfect for technical writers and developers working with Markdown-based documentation.

The tool shows both text diff (raw Markdown with syntax highlighting of changes) and preview diff (rendered HTML comparison). This lets you verify both the markup syntax and the visual appearance simultaneously.

Green highlights show additions (new content in the modified version), red shows deletions (content removed), yellow shows modifications (lines that changed), and gray shows unchanged content. Line numbers help track position.

Yes. Enable 'Ignore whitespace' to skip differences caused only by spaces, tabs, or line endings. This is useful when comparing Markdown files with different indentation or formatting conventions.

Yes. The preview uses marked.js which supports GitHub Flavored Markdown (GFM) including tables, task lists, strikethrough, autolinks, and code blocks with syntax awareness. All standard and extended Markdown features render correctly.

When enabled, modified lines show word-by-word differences within the line. Added words appear highlighted in green, deleted words in red with strikethrough, making it easier to spot exact phrase changes in paragraphs.

Yes. All comparison and rendering happens in your browser using JavaScript. No Markdown content is sent to any server. Perfect for comparing confidential documentation or proprietary content.

Yes. Use the 'Copy Diff' button to copy the text comparison to your clipboard, or 'Download Diff' to save it as a .txt file with all change markers preserved.

The statistics show how many lines were added, deleted, modified, or unchanged between versions. This gives you a quantitative overview of the scope of changes, useful for release notes or change tracking.

Markdown Diff Tool - Compare Markdown Files Online

Original Preview

Modified Preview

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