An online plagiarism checker that scans pasted text or uploaded documents, reports similarity results, and shows matching source links.

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CopyChecker is an online plagiarism checker designed to help users identify duplicate content and review originality in text. It allows users to paste text or upload a document, then scans content against a large database to generate plagiarism percentage reports and show matching source links. The tool is positioned for checking essays, academic papers, articles, and other written documents, making it useful for students, teachers, and professional writers who need to assess content similarity. The platform includes features such as deep plagiarism scanning, detailed originality reports, document statistics like word count and character count, and multilingual plagiarism detection for major languages. It is browser-based, so it can be used without installing software, and it provides a straightforward interface for checking text online. CopyChecker also offers related writing tools, including grammar checking and AI content detection, to support review of text quality and authenticity.

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