Diff Checker โ Find Additions ยท Deletions ยท Changes in Any Text
Real-time diff ยท Character-level ยท AI summary ยท Merge mode ยท Timeline ยท Git export ยท 100% browser
Free online diff checker for any text or code. Paste two versions and instantly see what was added (green), removed (red), and changed (amber). Add inline comments to annotate specific changes.
What is a Code Diff Checker?
A diff checker compares two versions of text or code and highlights what changed. It shows added lines in green, removed lines in red, and changed lines in amber โ exactly like git diff or a pull request review on GitHub.
Key Features
This tool includes side-by-side and inline views, character-level diff highlighting (exact words that changed), three diff algorithms (Myers, Patience, Histogram), AI-powered plain English summaries, 3-way merge mode, change timeline, and multiple export formats including .diff (git patch) and HTML reports.
Frequently Asked Questions
Can I add comments to specific diff lines?
Yes. Hover over any changed line and click the ๐ฌ button to add an inline comment. Comments are saved with the diff and visible in the output. Perfect for code review notes.
Is there a file size limit?
Maximum 5MB per file when using file upload. For pasted text, there is no hard limit but very large diffs (10,000+ lines) may be slower to process.