Compare two passages side by side and highlight exactly what was added or removed, line by line — useful for proofreading edits, contract changes, and revisions.
How it works
- Paste the original text in the left pane.
- Paste the revised text in the right pane.
- Review the visually highlighted differences, showing additions and deletions.
Frequently asked questions
What is the difference from a developer diff?
None at the core — it is the same algorithm, presented for writing and documents rather than code.
Can it compare long documents?
Yes, though very large texts are best chunked. The comparison is line-based.
Does my text stay private?
Yes — everything runs locally in your browser.