Download Viper, the plagiarism checker of choice

To download Viper please click the button below:


Viper is only intended for use on Windows operating systems, it will not run on Mac OS.

If you see a pop-up window like the one below, click 'save file': When your file has finished downloading, double click on it to install Viper:

how to save viper file

Alternatively on other browsers you may see the file downloaded to the bottom-left hand corner of your browser. Once it is complete simply click the file to install Viper:


Sometimes, if your anti virus software has certain settings, it will check that you want to install Viper. Don't worry, you can choose 'yes' with confidence. Viper has been certified by cnet/Download.com and is ranked by them as #6 in the World for Teaching Tools.

Viper the plagiarism scanner
Plagiarism-free work

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