Text Diff Checker
Compare two texts side-by-side and highlight all differences.
Original text
Modified text
About
Uses a line-based LCS (Longest Common Subsequence) algorithm -- the same approach used by git diff. Green lines were added in the modified version; red lines were removed. The split view pairs up changed lines side-by-side.
Compare two blocks of text and see the differences highlighted in a clear side-by-side or inline view. Ideal for reviewing code changes, comparing document versions, or verifying copy accuracy.
Key Features
Side-by-side diff
View both texts with additions and deletions clearly highlighted in green and red.
Line-level & word-level
See differences at the line level or drill down to individual word changes.
Change summary
Get a quick count of additions, deletions, and unchanged lines.
Client-side processing
Your texts are compared entirely in your browser with no server round-trip.
How to Use
- 1Paste the original text in the left panel.
- 2Paste the modified text in the right panel.
- 3The diff is computed automatically with differences highlighted.
- 4Review additions (green) and deletions (red) to understand the changes.