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What is Copyleaks?


Copyleaks is a plagiarism checker using advanced tracking and tracing technologies to scan for content online. Copyleaks enables various content related usages:

  • Education - Verifying content authenticity and originality in the education world
  • Copyright protection - Detecting plagiarism in the online publishing world
  • Security - Identifying internal document leaks and distribution
  • And more…
Who is Copyleaks for?


Our Plagiarism Checker for Education was created for educational institutions including teachers, students, and faculty. Our Plagiarism Checker for Businesses is mainly for SEO agencies, publishers, law offices, and any content creators.

  • Businesses
  • Media Publishers
  • Consulting Firms
  • Law Firms
  • Scientific Journals
  • SMBs
  • Education
  • Professors
  • Students
  • Teachers
  • Faculty
  • Websites
  • Website Owners
  • Content Creators
  • Bloggers
  • Editors
  • SEO Agencies


How much does it cost?


Our pricing works on a credit basis, according to the amount of words you are scanning, where 1 credit = 250 words. We offer two different plan options-prepaid and a monthly subscription. A prepaid plan allows you to purchase a set amount of credits and will not expire for 18 months. The monthly subscription renews every month with the set amount of credits and any remaining credits from the previous month will not roll over.Education PlansBusinesses PlansAcademic API plansBusinesses API plansWebsites API plans.


How can I contact Copyleaks?


You can you contact us here. You can also reach us at 1-855-633-9355. We would be happy to hear any thoughts, suggestions, or remarks you might have.


How does Copyleaks find the results?


Copyleaks has a very advanced cloud search software that searches for your content on billions of webpages, sites and also online databases. Our algorithms find comprehensive yet accurate results and work in almost every language.


What is the difference between our services?


Copyleaks offers five different services including Business, Education, Business API, Education API, and Websites API. You can see which is the best fit for you here.

Choose the service that is best for you:

We currently offer a variety of products that keep your content safe.


Website: Academic, publishing, and business content is safe with routine website scans that give you up-to-date and comprehensive results of who may be using your content. Our platform can easily find if a leak of sensitive test material or content is elsewhere.


API: Integrate your system with Copyleaks Open-Source API seamlessly using our ready-to-use code in different languages including C#, Java, PHP, NodeJS, Ruby and Python. Our API is also perfect for integrating with an LMS and other content management platforms that universities and education technology providers are already working with.


Mobile App: Snap a photo of text documents, insert live text, and upload documents from your device to be scanned immediately.


Document Comparison Tool

Compare files, live text, and URLs by choosing two texts to compare and receive a full report with the similarity percentage rate and similar word count.


Do you have a mobile app?


We currently offer an Android app and an iOS app that is fully connected to your desktop account and supports physical content scans as well as digital content (files and URLs). Easily take a photo of text and scan it in seconds to see if there is duplicate content. This feature is available in most languages.

The Copyleaks mobile app is easy to download from both Google Play and the Apple Store. Scanning on-the-go is made easy with our app and allows teachers and students the ability to take photos of a physical document and receive results in just a few moments.


Do you support multiple languages?


Copyleaks supports scans of content in a variety of languages (all Unicode languages), including Asian languages.

Our technology is able to scan all textual languages for plagiarism including Russian, Japanese, Chinese, Latin languages, and more.


What file and content types are supported by Copyleaks?


You can scan content for plagiarism in different file types and format. Currently, we support the following content types:

  • Online Formats: HTML and TXT(UTF8 encoded) files, submitted by URL.
  • File Types: txtpdfdocxdocrtfxmlpptxpptodtchmepubodpppsxpagesxlsxxlscsvLaTeX
  • Image Types (OCR): gifpngbmpjpgjpeg. The files must contain textual content and only the text will be scanned by Copyleaks.

Let us know if you need support in other file types.


Can other third parties like my teacher or school see what I have scanned?


No. Nobody will ever have access to the content you have scanned whether through a search engine or another plagiarism detection software. The only instance your work will appear is in the case that another Copyleaks user submitted the same content. In this case, only the identical parts will be shown and the rest of the text and your name (the source) will be hidden.


How fast will it take to run a scan?


Every scan takes into account a few variables-how long the document is, how many relevant results are found, and how many documents are uploaded at once. Most documents take an average of 5 seconds per page until results are finalized.


How does Copyleaks calibrate a score?


Copyleaks created a percentage that represents the amount of similar content to your text. We combine the results that are coming from online sources, external databases and the Copyleaks internal database.



How do I sign up?


Signing up to Copyleaks is very easy. Click here to get started!
Creating an account allows you to have access to all Copyleaks services including the main website, the API site, the mobile app, the Google Docs add-on, and the Microsoft add-in. 

Copyleaks is an advanced cloud platform for tracking and tracing content online. Copyleaks seeks to prevent plagiarism, promote originality, and detect leaks.  

Our sophisticated search engine finds content duplication in more than 60 trillion pages over the internet in various formats and any language. We routinely search for duplicates from the web that you can filter according to your needs and specifications. We provide a report in an easily accessible and inclusive format that summarizes the plagiarism detection scan results. Our algorithms include AI and machine learning technology to catch similar text that has been paraphrased.

How do I choose the content I want to scan?


Go to your Dashboard and select ‘Add New’. This is where you can choose to scan files, URLs, or raw text.

Our software can scan various file formats including PDF, DOC, TXT and more. This makes it easy for when publishers, editors, and teachers are uploading many files at once to scan for plagiarism together.

Copyleaks makes it easy for you to scan all kinds of files whether it's a website, plain text, or any sort of file. Scan your content for an originality report today.


How will I know if someone copied my content?


Go to your Dashboard and choose the content that you wish to see its results from ‘Your Scans’. This is where you will see a list of results ordered by the percentage of similar content. You can also press on ‘compare’ to see the full text comparison between your content and the specific result.

When you view the one-to-one comparison, this is the easiest way to see the difference and similarities between the content you have submitted and the content you have chosen to compare against including identical, similar, and related meaning content. It is then up to you to determine if the content has actually been copied or if it is a coincidence. Our AI capabilities also find similarities between paraphrased content.


What do the different similarity types in my content mean?


What do the different similarity types in my content mean?

Copyleaks is able to identify different kinds of similarity in your content. They are broken down into colors for identical, similar, and related meaning.

Identical - Exact wording in the text

Related meaning - Close meaning but different words

Similar - Nearly identical with different form i.e. “slow” becomes “slowly”

Read more about the types of similarity we are able to detect here.

The different similarities can be found and compared according to your use case to determine if there was in fact purposeful plagiarism. For teachers, it is best to filter the content comparisons they are viewing according to if they want to find paraphrased content or only identical matches.


What does the education report show me?


The report shows the breakdown of similar, identical, and related text. The pie chart is an aggregate score of the plagiarism meaning it takes into account all of the different results that have been found and they are then combined to give a total percentage.

You are able to break down the report and see the different similar content types including identical, similar, and related meaning matches. You can open each individual result and see a one-to-one comparison of how the text compares against each other.

For both teachers and students, it's helpful to have the education report with each result broken down so you can determine what is relevant for you to compare against further.



How can I choose which sources are shown in the education report?


You can easily select which sources you would like to view and can hide the sources that are not relevant for you to see. At the same time, you can choose to exclude different similarity types from the report so for example if you are only looking for “identical matches” you can do that. In order to do this, go to settings in the results bar and filter the results you would like to appear.

This is helpful for teachers who want to filter the sources they are allowing students to use more easily. It's also possible to hide sources that are not relevant for what you want to view.


What does the business report show me?


The report shows the similar results in order of the highest amount of similar content to lowest. The words in the report will be highlighted in different colors depending on if the text is similar, identical, or related.

Once you have selected a source, you can compare it against your text to see how similar the two texts are. Easily find duplicate content around the web with routine scans of your original content.


How can I share my results with others?


If you are using the Education service, you can click “Share” to generate a URL that you can share with anyone. If you are using the Business service, you can share individual one-to-one results by clicking “Share”.

Your privacy is our priority and we do everything to keep your content safe and secure. It is at your disclosure to share the similarity results with anyone including your students, colleagues, or a suspicious site. After sharing the link, you can later choose to revoke the sharing privileges

What does Copyleaks consider similar content to be?


Our system has a unique algorithm that is able to find various levels of duplicate content. Searching through phrases of words, we are able to detect a similar string of words, including paraphrased segments, and sentence restructuring. See more about the different kinds of plagiarism in our plagiarism spectrum here.

Once Copyleaks detects similar content, it is up to you of how you want to use the information. Many times students and teachers are scanning to check that their content has included references and quotes and in order to check themselves, they scan for similar content. As a teacher


How can I update the settings for storing my content in the database?


In order to update your submitted content settings, simply click "My Account" in the top right corner, go to "Settings", "Advanced Settings" and check or uncheck the statement.


What is considered a good or bad percentage of similar content?


While each case is unique, there are a few variables to keep in mind. The amount of content you have uploaded is a large factor, for example a document of 250 words is very different from a 10,000 word document. This can alter the percentage of similar content from a very small to a larger number. This is why you can view the similar passages that are highlighted easily to decide if there is legitimate plagiarism. If you are a student, there is typically a percentage of similar content you must stay under. Many teachers have a range of 20-30%, so this is a good bar to set when you receive your results.

Another option using the API is to filter results only according to the percentage of similarity you wish to see. For example, if you only want to see sources with more than 30% similarity, you can create this filter.


How can I delete my content?


If you would like to delete any content you have submitted, you can use this link. Once this has been done, nobody will have access to this content, including you.

We are fully compliant with GDPR and you can delete your content or account at any time. We have given full transparency for you to choose if you would like to delete your content from the database if you choose to no longer store this data.


Why do I still see the scans in my dashboard when I deleted them from the database?


You can be sure that your content has been removed, but you will still see the scans you submitted previously in the dashboard.



How can I restrict access to the results after I’ve already shared?


You can click "Revoke Access" at any time so only you will be able to view your results.


How can I delete my account?


We are sorry to see you go, but in the case you want to delete your account you can go to “My Account”, “Advanced Settings”, and click “Deactivate”. In the case that you delete your account, all data will be removed and you will no longer have access to previous scans and to any of your account’s data.

We are fully GDPR compliant and you may choose to delete your account information and user at anytime.