PlagScan

PlagScan compares your document with billions of others and highlights relevant correlations between them.

PlagScan is an entirely browser-based web service that verifies the authenticity of documents. Files can be uploaded in all common file formats (MS Word, PDF and many more). Alternatively, users can paste text directly into PlagScan and check for authenticity. Their service employs a highly advanced two-step algorithm based on the latest research in computer linguistics.