Text Diff Checker
Compare two texts side by side and see the differences highlighted. Perfect for code review and document comparison.
Compare two text strings line by line and highlight the differences. Useful for checking code changes, config diffs, and document revisions.
How to use Text Diff Checker
- Paste the original text in the left field.
- Paste the modified text in the right field.
- Review the highlighted differences: additions, deletions, and unchanged lines.
Features
- Line-by-line diff comparison.
- Color-coded additions (green) and deletions (red).
- Shows both side-by-side and inline diff views.
- Ignores optional whitespace differences.
FAQ
How does the diff algorithm work?
This tool uses the LCS (Longest Common Subsequence) algorithm to find the longest matching sequence of lines between the two inputs, then marks everything else as added or deleted.
Can I diff code with different line endings?
Yes. The tool normalizes line endings before comparison. You can also enable 'ignore whitespace' mode to focus on content changes rather than formatting.
Is there a character limit?
The tool handles inputs up to about 100,000 characters comfortably in the browser. For very large files, a dedicated diff tool like Beyond Compare or Git diff may be more appropriate.