Features

Viper is packed with brilliant features in order to provide a plagiarism scanning experience like no other. With incredible access to billions of sources, an easy-to-use interface and a comprehensive report on each scan, find out how Viper could save you from embarrassing unintentional plagiarism.

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Plagiarism-checking made easy

Ready to learn more? Discover our Features to learn how Viper can help you avoid plagiarism on your next piece of work or skip straight to a Comparison of our Free and Premium options and decide which suits you best!

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Sources

Check against 10 billion+ sources

Viper checks for plagiarism against over 10 billion sources, scouring books, papers, PDFs and journals across the web to find matches with your work.

Speed

Amazing quality and fast scan speed

With an average premium scan time of less than 30 seconds, you’ll be experiencing our lightning-fast scanning in no time. There are no delays – just easy to use, fast plagiarism scanning.

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Matching

Direct source matching

Each section of matched content in your work is highlighted so that it’s easy to locate. We also report the full URL of any sources that match so that you can find the original content and easily compare the result for yourself.

Simple

Easy to interpret plagiarism score

Each scan generates a detailed report showing you everything you need to know to understand how much plagiarism your work might contain. Each individual match has its own individual score, as well as an overall score for the document.

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Downloadable Reports

Downloadable plagiarism report

Download and take your plagiarism report with you wherever you go. It’s easy to submit to your teachers alongside your work as proof of originality or to send a copy to friends.

Multilingual

Supports 56 languages

Viper is able to scan for plagiarism in 56 of the world’s most popular languages, including English, Spanish, Chinese, Arabic and many more. See if your language is supported.

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Multiple File Types

Wide range of file types accepted

The modern classroom isn’t entirely based in Microsoft Office, so neither are we.

You can scan most types of text document, including Microsoft Word, PDF, OpenOffice and Google Docs formats. If you prefer to keep it simple, we also support plain text files, or you can just paste your text into our simple text box uploader. We now support PowerPoint Presentations, too!

Check against your own work

Check for self-plagiarism (Premium Only)

Store all of your work and scans together for easy access at any time. Check your past scans and even previous drafts of your work. Get matches from your past pieces of work and avoid self-plagiarism.

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Does your work contain accidental plagiarism?

Find out now and avoid embarrassment!

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What's the difference between free and premium scanning?

Viper Premium comes with additional features and benefits to deliver an even better plagiarism checking experience.

Free

Free checks are limited to 2 credits every 28 days and can be used as you like to scan either two documents up to 5,000 words in length, or one document of up to 10,000 words.

  • Checks against 10 billion+ sources
  • List of individually matched texts
  • Direct source matching
  • Downloadable plagiarism report
  • Dedicated customer support
  • Upload & scan multiple documents at once
  • Group draft work together into a project
  • Scan against your own documents
  • Delete work and scans

Premium

Just buy the credits you need, when you need them. All the same great features plus - get your results faster, prevent plagiarism and manage your projects from as little as £1 per scan!

  • Checks against 10 billion+ sources
  • List of individually matched texts
  • Direct source matching
  • Downloadable plagiarism report
  • Dedicated customer support
  • Upload & scan multiple documents at once
  • Group draft work together into a project
  • Scan against your own documents
  • Delete work and scans
  • Improved scan quality
  • Faster scan speed
  • Ad-free browsing
  • Work is never published online