PaperRater is a web site that offers a free document scanning service. Just paste the chosen text into the page and hit the Get Report button (remembering to enable the optional "originality detection" feature first), and you’ll get the details in just a few seconds. In addition to the report about the reading level of the document, and the standard of grammar, you’ll also receive details of whether the document is mostly original or whether large sections appear to have been copied from other web sites.
Read the full article here.