Identify potential plagiarism across nearly every language, detect AI-generated content, and confirm authenticity and ownership with the Copyleaks Plagiarism Detector.

Trusted by leading organizations and institutions:

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Plagiarism Has Evolved, So Should Your Detection

Check for plagiarism in over 100 languages using advanced AI to detect the slightest variations within the text, including hidden and manipulated characters, paraphrasing, and AI-generated content.


Take it beyond word-for-word plagiarism detection with the only platform that:

What You're Getting

Plagiarism Detector Features

AI-Generated Content Detection

The most comprehensive and accurate AI content detector with 99.1% accuracy, full model coverage including GPT-4 and Bard, detection in multiple languages, and the ability to detect paraphrased AI-generated content.

Cross-Language Plagiarism Detection

Supporting over 30 cross-language plagiarism scans, you can scan a document in English and find plagiarism and duplicate content matches in Chinese, German, and Portuguese.

Source Code Plagiarism Detection

Maintain source code transparency with the only platform capable of identifying AI-generated code plus the capability of detecting code plagiarism, code that has been modified, and licensing alerts to avoid potential infringement. 

Scheduled Recurring Scans

New content is being created at an unprecedented rate. Stay on top of how yours is being used with recurring scans that automatically keep your content safe from potentially plagiarized or unlawful duplication, adding a new layer of protection for your content.

Scheduled Recurring Scans

Unprecedented Search Results​

Easily detect different levels of content duplication and multiple forms of paraphrasing with trillions of pages of original content at your fingertips, along with:

  • 16,000+ open-access journals
  • 60 trillion websites
  • 1M+ internal documents
  • 20+ code data repositories
Search Results

File Comparison Tool​​

Compare two files against one another to ensure originality and prevent accidental and unintentional plagiarism.

Compare two files
Reporting Experience

A Reporting Experience Like No Other​

Every accurate plagiarism detector scan gives you a clear, comprehensive, interactive similarity report. Plus, you can download and even choose to share the findings report. It’s all up to you.

Build Your Team​

Invite individual members or an entire department from your organization, set up unique user-friendly scan profiles, view and share Similarity Reports, and more.

Grant Full Access ​

Collaborate without being limited. Invite colleagues, clients, or classmates and share all of Copyleaks’ capabilities with them under one secure account.

Military-Grade Security

A cloud-based system architecture, military-grade 256-bit encryption with SSL connection, and 100% HTTPS data transferring ensure your complete safety and security. Plus, we are GDPR-compliant and the only SOC2-certified platform.

Plagiarism Detection Where You Need It

Individual Use

Whether you’re a student, a freelance writer, or simply need quick detection, use the Copyleaks Plagiarism Detector today for free.

For Enterprise Use

Bring the power of the Copyleaks Plagiarism Detector to your native platform with seamless, fully white-labeled API integration.

For Educational Institutions

Our simple LMS integration empowers learning and error-free writing while keeping everything you need in one convenient place.

imagine learning
Copyleaks' tools give us an opportunity to help teachers save precious time that they can utilize to provide more personalized instruction to students while helping them understand the importance of academic integrity.

Kinsey Rawe, SVP & GM, Courseware & Instructional Services for Imagine Learning

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