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Diff Checker

Compares two blocks of text line by line and highlights what changed — computed entirely in your browser.

This runs entirely in your browser. Your text is never sent to a server — check your browser's network tab if you don't believe us.

How to use this tool

Diff Checker compares two blocks of text line by line and highlights what was added or removed.

  1. Paste the original text on the left and the changed version on the right.
  2. Differences highlight automatically — green for added lines, red for removed ones.