Text Compare

What Text Compare does

Text Compare lines up two blocks of text side by side and highlights exactly what changed between them — line by line — so you don't have to read through both versions manually to spot the differences. It runs entirely in your browser, which matters if the text you're comparing is sensitive.

How to use it

1. Paste the original text into the first box.
2. Paste the changed or updated text into the second box.
3. Click Compare Text to see the line-by-line differences highlighted.

Common uses

• Checking what actually changed between two drafts of a document or contract.
• Reviewing edits a collaborator made to a shared piece of writing.
• Comparing two versions of a config file or code snippet.
• Verifying that a translated or reformatted document didn't lose any content.
• Spotting accidental changes after a find-and-replace pass on a long document.

Good to know

The comparison works at the line level, so a single word changed in the middle of a long paragraph will flag the whole line as different rather than just that word — for very fine-grained, word-level diffing on code specifically, a dedicated code-diff tool may give a cleaner view. Because everything runs client-side in your browser, neither version of the text is ever uploaded anywhere, which makes it reasonable to use even on confidential drafts.

Manual proofreading for differences between two versions of a document is notoriously unreliable — the human eye is good at reading for meaning but bad at spotting a single changed word buried in an otherwise identical paragraph. A line-by-line diff tool catches exactly the kind of small, easy-to-miss edit that manual review tends to let slip through, which is why version comparison tools are standard practice in software development and increasingly common in document-heavy fields like law and publishing.