Sarah Chen, SEO Content Strategist
What This Tool Does
When you've edited a document — a README, a spec, a changelog — and want to know precisely what changed, this diff checker shows you. Paste the original and the revised version and it computes the minimal set of additions and removals, just like Git, and presents them with clear color coding.
Split & Unified Views
Split view places the two versions side by side with line numbers, making it easy to see deletions on the left aligned with additions on the right. Unified view collapses everything into a single patch-style column with + and − markers — ideal for copying into a review comment or understanding a change as a sequence.
Comparison Options
Toggle ignore whitespace to focus on real content changes when formatting or indentation shifted, and ignore case for case-insensitive comparison. The summary bar always shows how many lines were added, removed, and left unchanged.
Common Use Cases
- Doc review: see what changed between two drafts before merging.
- Changelog prep: identify exactly which lines moved or changed.
- AI edits: compare your original against a model's rewrite.
- Version audits: verify the difference between two file versions.
Tips
- Turn on ignore-whitespace after running a formatter to see only content changes.
- Use unified view to paste a readable diff into a pull request comment.
- Compare against an exported AI response to review suggested rewrites line by line.