Diff Checker
Diff Result
+0 added -0 removed 0 unchanged
How to Use
Paste the original text on the left and the modified text on the right. The tool instantly compares them line by line and shows a unified diff view. Green lines are additions, red lines are deletions, and gray lines are unchanged.
How It Works
This tool uses the Longest Common Subsequence (LCS) algorithm to find the minimal set of changes between two texts. It compares line by line, identifying which lines were added, removed, or kept unchanged. This is the same fundamental approach used by tools like git diff and Unix diff.
Privacy
All comparison happens entirely in your browser. No text is sent to a server, stored, or logged. You can safely compare sensitive documents, configuration files, or source code.