Plagiarism Checker from Copyleaks
Some of the world’s top businesses and schools trust our AI-powered plagiarism checker daily to spot duplicate content, paraphrasing, and AI-generated text, verify ownership, empower academic integrity, and ensure error-free writing.
Try the free plagiarism checker, with over 99% accuracy.
Plagiarism Has Evolved. Your Plagiarism Checker Should, Too.
In the wake of evolving AI technologies, plagiarism has evolved from how we once knew it. Check for plagiarism with advanced AI to protect original content and detect the slightest variations within the text. The industry-leading AI plagiarism checker seeks out hidden and manipulated characters, paraphrasing, and AI-generated content.
Take it beyond word-for-word plagiarism detection with the only platform that:
- Detects AI-generated content, including GPT-4, Gemini, and Claude
- Detects multiple forms of paraphrasing
- Identifies image-based text plagiarism
- Exposes attempts to deceive detection software
- Detects plagiarism in source code
Key Features of the Plagiarism Check Tool
AI-Generated Content Detection
Get comprehensive AI detection with over 99% accuracy, with full language model coverage, including ChatGPT, Gemini, and Claude.
Schedule Recurring Scans
With the rise of AI-powered content generators, new content is being created faster than ever. With recurring scans, you can stay on top of how your content is used, keeping your content safe from unauthorized AI use and potential plagiarism.
Source Code Plagiarism Detection
Compare source code files against one another and the internet to see if the code is original. giving you the documentation you need to act.
Powerful API and LMS Integrations
Integrate your Learning Management Systems with the plagiarism checker in minutes. Alternatively, use the Copyleaks API for advanced integrations.
Unparalleled Search
Easily detect various levels of content duplication and paraphrasing with access to trillions of original pages, plus:
- 16,000+ open-access journals
- 60 trillion websites
- 1M+ internal documents
- 20+ code data repositories
Plagiarism Detection in Over 100 Languages
A good plagiarism checker goes deep. Access one of the most extensive language databases available and easily scan and detect potential plagiarism in over 100 world languages.
A Reporting Experience Like No Other
Every scan gives you a clear, comprehensive, interactive similarity report. You can also download and even 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 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
Our cloud-based system uses military-grade 256-bit encryption with SSL and 100% HTTPS data transfer to ensure your complete safety and security. We are also GDPR-compliant and the only platform certified with both SOC 2 and SOC 3.
Check for Plagiarism using Tools & Addons
Ensure your content is original from social media posts, content marketing, school assignments, or your company webpage.
How Does Copyleaks Plagiarism Checker Work?
Upload and Scan
Begin by creating an account and uploading your existing content. Once scanned, our plagiarism checker will compare your text against billions of online sources, including Copyleaks’ Shared Hub database, Google, Microsoft Bing, and more. This process only takes a few seconds and yields remarkably in-depth results.
View and Customize Your Report
When Copyleaks’ plagiarism detector scan is complete, it will display a fully comprehensive, customizable report. This will show the identified similar text and the similarity percentage. It even allows you to compare your text against any other sources with its copy checker feature. You can also see three layers of text similarity and filter the sources according to your needs.
Once complete, you can download the report and share it with colleagues. It’s a clear, concise document that will help expedite your decision-making process.
The Importance of a Reliable Plagiarism Checker
A plagiarism checker protects the integrity of all content creation, from creative fiction to academic papers. Plagiarism is often considered an offense worthy of dismissal or expulsion. Thus, it’s crucial to take care to ensure that content created at school or on the job is entirely original.
A comprehensive plagiarism check is enough to give the final approval that the content in question is unique. The best tools produce reports with clear documentation to help support or dismiss accusations of plagiarism. A free online plagiarism checker is not typically reliable enough to produce defensible reports that stand up to interrogation.
That’s why so many institutions trust Copyleaks’ plagiarism checker with issues of academic and professional integrity.
Find out what's in your copy.
Get started with Copyleaks for free today!
Frequently Asked Questions
Copyleaks utilizes advanced natural language processing technology, also known as NLP, and machine learning algorithms to perform extensive searches across the Internet and various databases.
With our AI software, you can scan documents, raw text, code, and URLs in 100+ languages, complete with a detailed report on the findings of each scan.
Through our LTI and API integrations, we also support organizations in protecting against copyright infringement and academic plagiarism.
With the power of Copyleaks and OCR technology, you can parse text directly from an image to identify copied content. This is a handy tool for assignments that are submitted on paper rather than typed on the computer. Like any other file, you can simply upload the image file and the text will be extracted and then compared against the internet and other databases.
Accepted image files currently include: gif, png, bmp, jpg, jpeg.
Yes, Copyleaks is able to scan text from within a PowerPoint file.
Yes, with Codeleaks you can now scan source code and check if it has been used elsewhere.
You can upload code files in C#, Java, Python, HTML, XML, GO, C, C++, Javascript, Swift, Ruby, PHP, Perl, Scala, CSS, RMD and many more programming languages!
Our system is able to detect identical and similar content and in some cases paraphrased content. Our algorithm currently can pick up paraphrasing that has specific restructuring along with similar word choices and phrasing.
However, since paraphrased text can be manipulated in a variety of ways, sometimes algorithms are not able to catch all of it. In these instances, to avoid false positives, we will not always show the paraphrased content as a result.
Our algorithm is always being updated and will continue to find more cases of paraphrased text in work.
We can scan all major citation and reference styles including APA, MLA, Chicago, Vancouver, and more.
We consider one credit to be 250 words or less.
A document with 1-250 words would be counted as 1 credit, a document with 251-500 words would be counted as 2 credits and so on.
Learn how to check how many credits your document will cost before scanning here.
The Copyleaks sitemap tool allows you to import all URLs within your sitemap. From there, you can delete any URLs you don’t want to include in the scan.
To use this feature, click on the URL scan option. Then copy and paste your sitemap ending in .xml.
You can upload up to 100 files in each batch.
Simply drag the files into the dropbox or click Click to upload. Then you can upload multiple files or an entire folder.
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