Copyleaks plagiarism checker online fights plagiarism and copyright infringement. We have advanced technology that works in any language. Check for plagiarism to detect if your content is being used by others.

Plagiarism Checker Tool

Our plagiarism checker is the best service to check for plagiarism online. Using advanced algorithms, powered by cloud computing, to find copies of your content all over the internet. Our sophisticated search engine finds content duplication in more than 60 trillion pages over the internet. We support many file formats (doc, pdf, html, txt and more) in any language.

Consistent Plagiarism Check

Copyleaks plagiarism checker engine is the most comprehensive solution for searching copies of your content. We provide a report in an easily accessible and inclusive format that summarizes the plagiarism detection scan results. We routinely search for duplicates from the web that you can filter according to your needs and specifications.


Your content privacy is important to us. Copyleaks uses an encrypted connection (SSL) ensuring that your account’s content is secured. All of your content and results will be safe in our database only for your own use.

API For Plagiarism Detection

Copyleaks API (Application Programing Interface) allows you to easily integrate with Copyleaks plagiarism detector service. Our API tool allows you to include Copyleaks plagiarism checker as part of your product and simply fit it for your own needs.

For more information, visit our API Documentation.