Free Plagiarism Detection
On the Internet

I'm a Teacher. How Do I Use Plagiarism Checker?

Plagiarism Checker can help you find out whether a student's paper has been copied from the Internet.
Follow these steps:

Enter Phrases From a Student's Paper

Click in the search box. The search box should become blank and look like this:

Empty Search Box

If the search box still contains text after you click in it, click the Clear Search Box button. You can also use the keyboard shortcut defined in your Preferences page. The default keyboard shortcut for the Clear Search Box button is Alt-Shift-A.

Enter one or more phrases from different parts of a student's paper.1

Phrases Typed In

You may either type the phrases in or copy and paste them from a computer file. The second method is useful if your students turn in their work by e-mail or through a Web site.1

From Student Paper

Click the Search button

You can either click the Search button or use the keyboard shortcut defined in your Preferences page. The default keyboard shortcut for the Search button is Alt-Shift-S.

Plagiarism Checker will automatically screen the phrases you typed in and eliminate any that are shorter than six words. Phrases with more words are less likely to generate false matches in the search results.

Plagiarism Checker will also edit your search phrases if they are too long. Google has a limit of 32 words, and Yahoo's limit is 50 words.

If your search phrases need to be automatically edited, Plagiarism Checker will pop up a box letting you know and asking you whether you wish to continue with the search.

JavaScript Box by

Review the Search Results

The Google search results will show a list of Web pages that contain any of the phrases you entered into the search box. The paper we tested looks as though it has been copied from the Web!

Google Search Results

Use the Back Button

Use your browser's Back button to return to Plagiarism Checker and do another search. You can also hold down the Alt key and tap the left arrow key to go Back.

Click Here to Check for Plagiarism Now.


  1. The plagiarism-checking examples on this page were based on content from the Web site at
    Science Fair Projects - Science Experiment - Human Battery. 28 Jan 2006 <>.