What does the diff checker's similarity score mean?

It calculates word-level similarity between two texts you provide and highlights exactly which words were added, removed or kept. A lower similarity score means more of the wording was altered. It is a comparison aid, not a prediction of any detector's verdict.

Is this a plagiarism checker?

No. It compares two texts you paste against each other; it does not search the web or any database, and it cannot say where a text came from.

Is it free? Is my text uploaded?

Yes, it is free with no sign-up and the comparison runs in your browser.

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