Alternative questions:

  • Does it account for collusion?
  • Does PlagScan check for documents other than those on the internet?
  • Which publisher databases are available to PlagScan?

PlagScan's plagiarism search is based on four types of sources:

  1. World Wide Web: We use Microsoft Bing to search the World Wide Web. Anything indexed by Bing is available for a plagiarism check. Additionally, we can scan academic sites and those of particular interest to our customers, thereby providing coverage of internet content uniquely tailored to their needs.

  2. Your Repository / Collusion Checking: You can upload files and compare them with the document you want to analyze. For organizations: You have the additional option of creating/importing your organization-wide repository, so you can cross-check the documents of all the users on a given platform.

  3. Cooperating Publishers: PlagScan has millions of articles from thousands of academic and scientific journals available for your plagiarism checks.

  4. Plagiarism Prevention Pool (optional): If you choose to contribute your documents to the plagiarism prevention pool, you can compare them with documents from other PlagScan users. NOTE: Other users will not gain full-text access to your documents that way, but will only be able to see their own matches with your documents.

Learn more on our page Algorithm and Sources.

Unfortunately, we are not allowed to access Google services such as Google Search, Google Books and Google Scholar like a private user, due to terms of use and copyright protection of the published authors and Google's terms of service. Currently, Google does not allow access to its API for use cases, where the search results are not shown directly, because that violates their business model and agreements with the publishing industry. We are regularly checking our options and will immediately provide coverage of Google content as soon as the regulations undertake the respective change.

For crawling web content, we use Microsoft Bing as backbone to enhance our available internet content in addition to our own web index, focusing on scientific and academic relevant sites.

The time it takes to process a document depends on multiple factors, such as its length and the prevalence of its topic online. Generally, you can assume that your report will be finished within 10 minutes. However, during peak hours with very high server load, it may take a bit longer to process your documents. We apologize in advance and ask that you check back the next day. If by then your upload and analysis are still not finished, please contact us immediately.

First things first: Your documents are NEVER available on the public internet after you upload them to PlagScan. As a single user, nobody has access to the full-text of your documents as long as you do not explicitly share your plagiarism reports. Here is a list of how your documents can serve as a source for others, based on their respective settings (again, WITHOUT sharing the full-text).

  Internet User database Organization database Plagiarism Prevention Pool
Compare with web sources never - - -
Check against my documents never + - -
Share with my organization never + + -
Become part of the Plagiarism Prevention Pool never + + +

1. Make sure you use the right login:

  • Username and password if you created an account
  • Social-media logins (Google, Yahoo, Microsoft, Facebook)

2. If you forgot your password:

  • Go to the Login page and click on Request a new password.
  • You will get an email with your new password.
  • Make sure to change your password (in your account settings) to something you can remember.

You can either view your plagiarism reports directly with a browser, or you can download them as .pdf files. The MS Word .docx report is particularly useful, since plagiarism findings are annotated directly within the Word document.

PlagScan uses an encrypted document transfer method (256-bit SSL via HTTPS) for maximum security. If you would like to activate encryption prior to logging in, select https://www.plagscan.com. Secure Socket Layer (SSL) is the protocol that enables this safe data transfer via the internet. The SSL protocol makes sure that sensitive data, such as credit card information, cannot be read or manipulated. Many browsers such as Microsoft Internet Explorer, Firefox, Opera, Chrome and others support SSL. The use of SSL is indicated by a padlock icon somewhere in your browser. The position of this icon may vary based on which browser you are using.

PlagScan allows you to create multiple organizational users at the same time. If you have a user table in digital form, you can upload it via a table file (.csv, .xls, .xlsx, .ods from MS Excel or another spreadsheet program).

We support all popular text formats, as well as ZIP archives of text documents. Depending on the format, a minor change in the original formatting may occur. PlagScan supports the following text formats:

Supported text formats:

Preferred format Formatting will be preserved
docx - Best result for the word report Microsoft Word 2007/2010/2013/2016 [.docx]
pdf - Best result for the browser report Portable Document Format (Adobe Acrobat) [.pdf]
Other possible formats Conversion to .docx, some formatting might be lost
doc Microsoft Word 97/2000/2003/XP [.doc]
txt Plain Text [.txt]
html HTML Document [.html]
pages Pages for MAC (Apple iWork) [.pages]
ppt Microsoft Powerpoint [.ppt]
doc6 Microsoft Word 6.0 [.doc]
doc95 Microsoft Word 95 [.doc]
wps Microsoft Works [.wps]
wpd WordPerfect [.wpd]
odt Open Document Text (LibreOffice) [.odt]
ott Open Document Text [.ott]
rtf Rich Text Format [.rtf]
sdw StarWriter 5.0 [.sdw]
sdw4 StarWriter 4.0 [.sdw]
sdw3 StarWriter 3.0 [.sdw]
sxw OpenOffice.org 1.0 Text Document [.sxw]
Supported formats Formatting will be lost
xlsx Microsoft Excel [.xlsx]
xls Microsoft Excel [.xls]
pptx Microsoft Powerpoint [.pptx]
docbook DocBook [.xml]
ooxml Microsoft Office Open XML [.xml]
pdb AportisDoc (Palm) [.pdb]
latex LaTeX 2e [.ltx]
numbers Numbers for MAC (Apple iWork) [.numbers]
key Key for MAC (Apple iWork) [.key]

The only entity of your document is the one you uploaded yourself. As soon as you delete a document, no plagiarism check can use it for comparison. The only possibility to plagiarize yourself using PlagScan is, if you upload a document (or slightly modified versions of it) several times and set your data policy to check against your own documents.

Scientifically/technically speaking, if you have published text before, you also need to cite your own work properly in a new publication. It doesn't really make a difference, whether it is your own or someone else's work. Ethically, it makes all the difference, of course.