Consistency & QA · Free · Private
About this free manuscript diff
Track what changed between revision passes. This manuscript diff tool compares two pasted versions word-by-word — highlighting additions and deletions with word-count stats — so you can review AI edits, beta feedback, or your own rewrites without Microsoft Word.
How to use the Manuscript Diff
- Paste the original text in Version A.
- Paste the revised text in Version B.
- Click Analyze to generate the word diff.
- Review green additions and red deletions.
- Use Swap to flip versions if needed.
Frequently asked questions
Is this a line diff or word diff?
Word-level diff — best for prose edits where sentence structure changes slightly.
Is my manuscript uploaded?
No. Diff runs entirely in your browser.
Can I compare AI-edited chapters?
Yes. Paste before and after AI revision to see exactly what changed.
Browse all free writing tools for fiction authors