Text Diff Checker

Compare two texts and highlight added and removed lines.

Original text

Changed text

Result

About the Text Diff Checker

The Text Diff Checker compares two versions of any text and shows you exactly what changed, line by line. Added lines appear in green with a plus sign, removed lines in red with a minus sign, and unchanged lines stay neutral. It uses a longest-common-subsequence algorithm — the same approach behind code diff tools — so the comparison is accurate even when lines move around.

How to use it

Paste the original text on the left and the changed text on the right.
Click Compare to generate a colored, line-by-line difference.
Read the summary to see how many lines were added or removed.

Frequently asked questions

Does it compare word by word or line by line?

This tool compares line by line, which is ideal for documents, lists, configuration files and code.

Is there a size limit?

There is no hard limit, but very large texts take longer because the comparison grows with the size of both inputs.

Is my text private?

Yes. The comparison runs entirely in your browser and nothing is sent to a server.

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