Text Diff Checker
Compare two texts and highlight added and removed lines locally.
Each input up to 100 KiB and 2,000 lines. Line endings are normalized. Differences consisting only of a final newline are ignored. This is a text comparison, not a semantic code comparison. All processing stays on this device.
Result
Your result will appear here after processing.
How do I use this tool?
Paste original and changed text. Compare by line, optionally ignoring letter case or whitespace. Copy or download the unified line report.
What does it support?
Each input up to 100 KiB and 2,000 lines. Line endings are normalized. Differences consisting only of a final newline are ignored. This is a text comparison, not a semantic code comparison.
Does my input leave my device?
No. Processing runs locally in your browser. Input and results are kept only on this page and are cleared when you leave, reload or clear the tool. Copy and download happen only when you choose those actions.