Text Diff Checker
Compare two blocks of text and highlight changes.
About this tool
Paste two versions of anything and see what changed. The usual cases are a contract that came back from legal, two rounds of copy from different people, or a config file that works on one machine and not another.
Both sides are compared in your browser and neither is uploaded, which matters when the two things you are comparing are contracts or credentials.
Common questions
Can it show word-level changes rather than whole lines?
Yes, and for prose that is usually what you want — line-level diffing marks an entire paragraph as changed when one word moved. Line-level is better for code and config, where a line is the meaningful unit.
Is my text sent to a server?
No. The comparison runs entirely in the browser, so nothing you paste leaves your machine.
Why do two files that look identical show differences?
Almost always invisible characters: trailing spaces, Windows CRLF against Unix LF line endings, tabs versus spaces, or a non-breaking space pasted in from a document. These are exactly the differences a diff exists to surface.
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