Text Compare & Diff Checker
See exactly what changed between two versions, line by line, colour-coded.
Two drafts of the same document, a contract before and after the other side's edits, a config file that worked yesterday — the differences are usually small and reading for them by eye is how they get missed. This compares the two line by line using the same longest-common-subsequence approach a version control diff uses, so it shows the genuinely changed lines rather than declaring everything after the first edit different.
How to Use the Text Compare
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Paste the original version into the left box.
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Paste the version you want to check into the right box.
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Read the colour-coded result: green is added, red is removed, grey is unchanged.
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Turn on “Show only differences” for a long document, or copy the diff to share it.
Why Use TextsPro
The comparison runs entirely in your browser, so contracts, legal drafts, unpublished copy and config files containing credentials are never uploaded — which is exactly the category of document people most often need to diff. The algorithm is a proper longest-common-subsequence diff rather than a line-by-line equality check, so inserting one line near the top does not mark the entire rest of the document as changed. Options let you ignore case and collapse whitespace, which is what you want when comparing text that has been reflowed or re-indented rather than genuinely rewritten. The result copies out in unified-diff format, ready to paste into a ticket or a pull request comment.
- Processed in your browser — files are never uploaded
- Instant results with no queues or waiting
- No signup, no watermarks, completely free