Welcome to Viper - a leading alternative plagiarism checker which, using its range of powerful features, will help you check for plagiarism and duplicate content in your work. From individual students to lecturers and institutions, Viper is the plagiarism checker of choice for thousands of people every month.

Viper checks your document for plagiarism against more than 10 billion sources across the internet! These include essays, journals and numerous other sources!

Users receive a clear and concise highlighted plagiarism report, showing exactly where your document has matched to other existing content.