Top college plagiarism checkers, including Turnitin, Plagium, PlagiarismDetect and Plagiarisma, are all available online at dedicated websites, explains GrammarCheck. While some plagiarism checkers are free, many colleges and other educational institutions establish relationships with plagiarism checking sites, with some professors requiring students to run work through these sites.
Turnitin is a plagiarism checker especially designed for use by teachers and professors within a college or educational environment. Over 15,000 schools pay for the service to evaluate students' essays and reports for plagiarism, with over 300,000 papers reviewed daily, according to Turnitin. Turnitin flashes through billions of Web pages, archived college student essays and academic journals in plagiarism searches that typically take less than a minute per paper.
Plagium lets user paste in up to 250 characters of text at a time for plagiarism detection, as Educational Technology and Mobile Learning explains. While basic detection is free, users must register with the service to check URLs and larger files.
PlagiarismDetect is a free service that provides fast, accurate results, presenting the original text side by side with text believed to have been copied, according to GrammarCheck. The service also provides users with a count of words and sentences that may be plagiarized.