Plagiarism Checker

You can try our online plagiarism checker free by registering for a Copyleaks account here.

Copyleaks can scan more than 100 languages, including English, Spanish, French, Portuguese, Arabic, Russian, German, Greek, Chinese, and Japanese.

Please note that scans will only be done in the same language you have submitted. For example, if you submit a scan in Spanish, Copyleaks will only search for results in Spanish. 

hat are the different types of text similarity for the Plagiarism Checker?

Our plagiarism scans offer three layers of text similarity detection: 

• Identical– 1 to 1 exact word matches, highlighted in red
   
• Minor changes– text with minor variations from the source but conveying the same meaning. Example: changing “he was running” to “he ran”. Highlighted in light red.
   
• Paraphrased– text that is rewritten using different words or sentence structures, but the core idea remains the same.
   
• Omitted– the portion of text that is not being scanned for plagiarism based on the scan settings. (example: the ignore quotations setting is enabled, and the document is 20% quotations = the omitted words percentage is 20%), unhighlighted. 

We also provide information on how much of the text you are not scanning for plagiarism (omitted words) based on your scan settings.

Any plagiarism checking tool can potentially miss small elements. However, Copyleaks works hard to provide an extensive plagiarism checker that ensures 100% authenticity of original content, whether it’s our online plagiarism detector or through an LMS or API integration.

Plagiarism checkers vary in accuracy. We take pride in using the very best of machine learning, multi-language capability, and Multi-language and extensive search capabilities to provide you with the most accurate plagiarism results. Our commitment to innovation means we’re improving every day. 

Google, Edge, and more. When scanning against the internet, Copyleaks goes beyond site-by-site to detect plagiarism. In fact, each search spans across all publicly accessible sites in the United States and worldwide that would be found through the most popular search engines.

No. Though you are inputting your work into a plagiarism checker, it is important to note that we will never steal your work. We will check your work for plagiarism and will allow you to download a report based on our checks.

With our Similarity Report, you can view your document’s overall percentage of similar content. Additionally, we separate similar content into three categories: Identical, Minor Changes, and Paraphrased. 

The report breaks down these categories by different percentages. You can customize the report to focus on precisely what you want to see.

Our plagiarism detector scans text from all open-access journals and databases to detect plagiarism online. This includes over 16,000 academic journals and publications from Frontiers, Wiley, Elsevier, and thousands more.