Markdown Diff — Compare Markdown Documents Side by Side
Compare two Markdown documents and see exactly what changed. Visual diff highlighting in the source view, plus rendered previews of both versions. 100% client-side — your documents stay private.
How to Use the Markdown Diff Tool
- Paste the original Markdown in Version A and the modified version in Version B.
- The diff view shows line-by-line changes: red for removals, green for additions.
- The rendered preview shows how each version looks when rendered.
- Use Swap to exchange the two versions.
Why Use a Markdown-Specific Diff Tool
Unlike plain text diff tools, Markdown Diff can show you both the raw source changes and the rendered output side by side. This makes it easy to spot not just text changes, but formatting differences — especially useful when reviewing documentation edits, blog post revisions, or collaborative Markdown files.
Frequently Asked Questions
This tool shows the rendered (formatted) output of both versions alongside the source diff, so you can see exactly how formatting changes affect the final document.
Yes. The diff view handles documents of any length. For very large documents, the rendered preview may be slower due to browser rendering limits.
Use Cases
Document Review
Review changes to documentation, blog posts, or README files before publishing.
Collaboration
See exactly what your co-author changed in a shared Markdown document.
Version Comparison
Compare different versions of your Markdown files side by side to track content evolution.