Original Text
Modified Text
Paste text in both boxes above to see differences highlighted
Compare two texts or documents side by side. Instantly highlights added, removed, and changed lines. Word-level diff available.
The Text Diff Checker finds the exact differences between two blocks of text. It is ideal for proofreading revisions, checking changes in code and tracking edits to documents.
Different tasks require varying levels of granular tracking. Line Mode is ideal for source code comparison. Word Mode is perfect for tracking essay or legal document revisions, while Character Mode helps you find that one missing semicolon or typo in a dense configuration file.
When comparing contracts, confidential documents or private code, privacy matters. Your text is compared on your own device and never leaves it.
A side-by-side diff shows both versions of the text in parallel columns with differences highlighted, making it easy to visually scan what changed and where. A unified diff instead shows a single merged view with additions and deletions marked inline — the format most developers recognize from version control tools like Git.
Whitespace sensitivity is worth checking before relying on a diff result: some comparisons treat extra spaces, tabs, or line breaks as meaningful differences, while others ignore them. If you're comparing two versions of a document that were reformatted (but not substantively changed), a whitespace-insensitive comparison will more accurately highlight only the real content changes.
Top questions about the Text Diff Checker.
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