Turnitn is an internet based plagiarism prevention commercial service by iParadigms, LLC.
It is used to submit documents like research papers, synopsis and thesis, etc. Turnitin website, which checks the documents for unoriginal content. Turnitin checks for potential unoriginal content by comparing submitted papers to several databases using a proprietary algorithm. The essays submitted by students are stored in a database used to check for plagiarism. This prevents one student from using another student’s paper, by identifying matching text between papers.
Students as well may upload their papers as individual documents directly to the service, for teachers to access later on. Teachers may also submit student papers to turnitin.com as individual files, a bulk upload, or a ZIP file. Teachers can also set up the assignment analysis options so that students can review their originality reports before they make their final submission. A peer-review option is also available.