1、Turnitin，
Turnitin is one of the mainstream academic misconduct detection systems in the world, and its research and development company iParadigms focuses on the original detection of manuscripts and the development of electronic evaluation systems. Turnitin system is basically consistent with the technical support, detection ability and database comparison of CrossCheck anti-plagiarism detection system designated by internationally renowned publishing houses (including more than 80% SCI journals).
2. Copycape inspection,
This website provides a service to check whether the webpage is plagiarized. When you enter the home page, there is a URL input box. However, if a website is frequently queried this month and the number of times has reached the upper limit, you need to register as a platinum user before you can continue to use it.
3. Doppler Checher detection,
This website can directly paste a paragraph of text into the input box for query, but the number of words in each query cannot exceed 1000 (there will be a word reminder). At the same time, you can also select a file (word document or Notepad document) to upload the query. If the results appear, you can click on the comparison text to see the specific situation.
4. Plagiarism system,
This website can not only directly search for words (supporting languages above 190), but also query a webpage and upload files. However, for words, the option of searching through Google is only available to registered users.
5. Plagiarism checker,
All the services of this website are complete, you can consult documents and pages, and there are detailed steps on the home page, which can be used by teachers and authors.