Viper

What Viper is

Viper is a web app for checking documents for plagiarism and AI-generated content. It provides reports with highlighted matches, source URLs, scores, and downloadable PDFs. Viper says its checks cover 16,000+ open-access journals, 60 trillion websites and search engines, 1M+ optional internal documents, and 20+ code repositories. It supports over 100 languages and cross-language matching across more than 30 languages. Users can adjust scan sensitivity, exclude references, quotes, citations, or tables of contents, and scan up to five files in one batch. Supported formats include HTML, TXT, RTF, XML, Markdown, PDF, DOCX, PPTX, ODT, EPUB, and XLSX, among others. Documents can be uploaded from Google Drive, and users can sign in with a Google account. Viper says repository storage is optional and stored documents are not shared publicly; users can request permanent deletion through support. The free service allows one scan of up to 5,000 words per document. Paid credits are sold as one-time packages, starting at £5.00 for 10 credits, with each credit covering up to 250 words.

Who it suits

Viper is designed for students and also serves institutions, schools, universities, businesses, and professionals. It may suit people who need plagiarism or AI-content checks across a range of document formats and languages.

Limits

The free service permits one scan of up to 5,000 words per document. Paid usage is credit-based, with each credit covering up to 250 words; packages range from 10 to 1,000 credits.

Getting started

1. Open https://www.scanmyessay.com/ in a web browser
2. Sign in with a Google account or use the available account route
3. Upload a document directly or from Google Drive
4. Choose scan sensitivity and any exclusions
5. Scan one file free or select a one-time credit package
6. Review matches and export the report as a PDF

Verdict

Viper offers document checks, configurable scan controls, and downloadable reports through a web app. Consider the free scan limit and one-time credit packages when estimating how much checking you need.