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🔍 Text Diff Checker

Paste two versions of a text below to instantly see the line-by-line differences — added, removed and unchanged lines highlighted.

Original Text

Changed Text

About This Text Diff Checker

This free online text diff / comparison tool compares two blocks of text line by line and highlights exactly what was added, removed, or left unchanged — similar to how "git diff" compares code changes. It's useful for spotting what changed between two drafts of an article, two versions of a contract, or two versions of a config file or code snippet.

The comparison runs instantly in your browser with no signup — both texts you paste in stay private and are never uploaded anywhere.

Frequently Asked Questions

Is my text uploaded anywhere?

No — the comparison runs entirely in your browser using JavaScript. Nothing is ever sent to a server.

How does the comparison work?

It compares the two texts line by line using a longest-common-subsequence algorithm — the same general approach used by tools like 'git diff' — and highlights lines that were added, removed, or left unchanged.

Can I compare code or documents?

Yes — paste any plain text, including code, articles, or contracts, to quickly spot what changed between two versions.

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