Diff Checker
Paste two versions of your text to see exactly what changed — additions highlighted in green, deletions in red.
Original
Modified
Diff Result
Added
Removed
Click Compare to see the diff.
About the Diff Checker
The diff checker compares two texts line by line and highlights what has been added, removed, or kept the same. This is useful for reviewing code changes, comparing document revisions, or spotting the difference between two versions of a configuration file.
How it works
This tool implements a longest common subsequence (LCS) algorithm to compute the minimal edit required to transform the original text into the modified text. Lines in common appear without highlighting; removed lines appear in red with a minus sign; added lines appear in green with a plus sign.
Privacy
All diffing happens locally in your browser. Your text is never sent to any server.