Diff Checker
Compare two blocks of text and see the differences highlighted line by line.
- Word-level diff — highlights changed words within lines
- Ignore case and/or whitespace differences
- Export results as a .diff / .patch file
How Text Diffing Works
A diff algorithm compares two texts and identifies the specific additions, deletions, and modifications between them. The output highlights exactly what changed, making it easy to review edits at a glance.
The most common algorithm is the Longest Common Subsequence (LCS) method, which finds the longest sequence of characters shared by both texts and marks everything else as changed. This is the same approach used by Git and other version control systems.
Diff tools are essential for code reviews, document revision tracking, and comparing configuration files. Our tool compares text side-by-side in your browser with color-coded highlighting for additions and deletions.
Frequently Asked Questions
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