Diff Checker
Compare two texts and highlight added, removed, and changed lines.
100% Private — Nothing is Uploaded
All processing happens locally in your browser. Your files never leave your device and are never sent to any server.
Paste two texts above and click Compare.
About the Diff Checker
This tool compares two versions of a text and shows exactly what changed — line by line and word by word. It is perfect for comparing code, configuration files, or any two pieces of text.
Features
- Side-by-side view — see both versions aligned.
- Unified view — a compact format like
git diff. - Word-level highlighting — see exactly which words changed inside a modified line.
- Line numbers — track position in both files.
- Stats — added, removed, and unchanged line counts.
- 100% client-side — your text is never uploaded.