Plagiarism Detector

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

Ensure originality with award-winning plagiarism detection.

The Copyleaks Plagiarism Checker uses advanced AI to detect plagiarism in over 100 languages, the slightest variations within the text, paraphrasing, and AI-generated content.

Combined with the award-winning AI Detector, Codeleaks Source Code Detector, and the all-new Writing Assistant, for a truly full-spectrum suite dedicated to creating original, error-free content.

Detect Plagiarism
In All Its Forms

Ensure your content is original and free of any and all plagiarism, including multiple forms of paraphrasing, image-based text plagiarism, manipulated or hidden characters, and more.

A Unique Reporting Experience, How You Want It

Control what data you want to see on your plagiarism scan report. Do you want to search for cross-language plagiarism? Exclude certain sources? It’s up to you. Plus, once your report is generated, you can download and share it.

Copyleaks sample report
Scan Profile Settings
Source examples

An Unparalleled Search For Your Most In-Depth Results

Know that you’re getting the most in-depth results with every scan from an unparalleled search volume, including: 

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

Ready to get started with the Copyleaks Plagiarism Detector?

Key Features

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AI-Generated Content Detection

Over 99% accuracy, full model coverage including ChatGPT, Gemini, and Claude, detection in over 30 languages, and the ability to detect paraphrased AI-generated content.

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Cross-Language Plagiarism Detection

With cross-language support in over 30 languages, you can scan a document in Spanish and find potential plagiarism matches in Chinese, German, Portuguese, and more.
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Source Code Plagiarism Detection

Identify AI-generated code, code plagiarism, modified code, and licensing alerts to avoid potential infringement all in one, robust solution.

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Scheduled Recurring Scans

Scheduled recurring scans add an extra layer of protection and automatically protect your content from potential plagiarism or unlawful duplication.

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Over 100 Languages Supported

Detect potential plagiarism in over 100 human languages, including German, Russian, Spanish, English, and more.

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Military-Grade Security

All Copyleaks products come with military-grade security along with GDPR compliance and both SOC 2 and SOC 3 certification. For full security details, click here.

Plagiarism Detector Integrations

For Educational Institutions

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

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Node JS

For Enterprise Use

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

NSS Gerard K. O’Neill Space Settlement Contest Case Study

How NSS used Copyleaks to improve plagiarism detection within contest essay submissions.

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Campaign KPIs

Accuracy, Analysis Depth, & Workflow Efficiency

imagine learning
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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