Text Diff Checker
Compare two texts line by line and highlight added, removed, and unchanged lines with a summary.
How to Use Text Diff Checker
The Text Diff Checker is a free online tool that compares two texts line by line and highlights the differences. Added lines appear in green, removed lines in red, and unchanged lines remain neutral. A summary shows the total number of additions, removals, and unchanged lines. Whether you are comparing code versions, checking document revisions, verifying configuration changes, reviewing content edits, or debugging text transformations, this tool provides clear visual feedback on exactly what changed between two versions. Uses an LCS-based algorithm for accurate diff results. All comparison happens in your browser with no data transmitted anywhere.
Step-by-Step Instructions
- Paste the original text in the left input area
- Paste the modified text in the right input area
- Click compare to see the highlighted differences
- Review added (green) and removed (red) lines with the change summary
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