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Text Diff Checker

Text Diff Checker compares two blocks of text and highlights added, removed, and changed lines, entirely in your browser.

No upload Instant Free No sign-up

How to compare two blocks of text

  1. 1 Paste the original text on the left and the changed text on the right.
  2. 2 Click "Compare" — added, removed, and unchanged lines are highlighted.

Frequently Asked Questions

Does this upload my text anywhere?
No — comparison happens entirely in your browser.
Does this compare word-by-word or line-by-line?
Line-by-line — each line is compared as a unit, which works well for code, lists, and most structured text.

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