Plagiarism Checker Pro

Plagiarism Checker Pro

To use this plagiarism checker, please copy and paste your content in the box below, and then click on the big blue button that says “Check Plagiarism!” then sit back and watch as your article is scanned for duplicated content.

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About Plagiarism Checker Pro

Plagiarism Checker Free

Plagiarism checker is a free online tool that helps writers, bloggers, and webmasters to check for plagiarism. It scans and compares files against the submitted text to detect plagiarism.

What is Plagiarism?

As Wikipedia says,

“Plagiarism is the representation of another author's language, thoughts, ideas, or expressions as one's own original work.”

According to Merriam-Webster,

"To steal and pass off (the ideas or words of another) as one's own: use (another's production) without crediting the source"

For details, check

How Does Our Plagiarism Checker Work?

Using advanced AI, our online plagiarism checker detects duplicate content and generates plagiarism reports free of charge.

It works better than Turnitin. Apart from the student's archived thesis, it scans online-available data on search engines to check plagiarism.

This plagiarism detection tool  assists you to detect similar content across the web. It has an advanced algorithm that allows our plagiarism detector to find copied or paraphrased content. After finding plagiarism, it provides links to plagiarized sources.

We have developed this plagiarism tool to identify all types of plagiarism i.e. incremental, patchwork, and accidental plagiarism.

How to Check Plagiarism For Free?

Follow the steps below to find copyrighted content with our copyright checker:

  • Copy your text and paste it into the given input box.
  • You can upload a file too. Click on the Select File button to upload a document from local storage or import files using the Google Drive option.  
  • If you want to exclude a specific URL, click on the Exclude URL button and paste the URL in the input box.
  • You can exclude quotations by clicking on the Exclude Quotes checkbox.
  • Hit the Check Plagiarism button to start plagiarism detection. 

Understanding the Result

Once our plagiarism Scanner completes the scanning of your text, here are some elements that you will see in the results.

Percentage of plagiarized content

The exact percentage of plagiarism in the content will be shown near the top of the result section right next to a circular graph.

Percentage of unique content

The percentage of unique content in the given text will also be shown prominently near the top of the result section.

Exact phrase match

In the results, you will be able to see the exact lines and phrases in your text that match with other sources on the internet. All the exactly matching lines and phrases will be underlined in red by our plagiarism checking tool.

Matched sources

By clicking on any of the red-underlined sentences/phrases, you will be able to see the URL of the source that it is matching with.

Key Features of our Duplicate Checker

Some of the key features of our duplicate content checker are given below:

1. Upload File to Check Plagiarism

Upload files from local storage to check for plagiarism. It offers support for various file types such as doc, docx, pdf, txt, etc.

2. Word Count and Clear Field Option

When importing your content to the tool, the exact word count will be provided below the input box. If you want to clear the field for a fresh start, you can click on the Delete icon to erase the input.

3. Ensured Content Safety

The content you check on Prepostseo Plagiarism checker is 100% safe and secure. We respect your intellectual property and don't save the content in any repository.

4. Plagiarism Reports Generation

You can download reports in HTML and PDF format. Click on the Download Report button to get the full report.

5. Remove Plagiarism

After checking for plagiarism, click on the Remove Plagiarism button.

This will open our paraphrasing tool that you can use to paraphrase your content to avoid plagiarism.

6. Deep Search

This duplicate content checker uses its own deep search algorithm to check plagiarism online by conducting deep web searches all over the internet.

We provide a free online plagiarism checker with percentages that help you determine how much original and copied content you have in your document. And it provides a detailed analysis of original and copied content, with matching sources.

7. Easy to use

The plagiarism checker free by Prepostseo is very easy to use. All the features are prominently displayed and the process is quick and simple. You just have to enter your content and click on the “Check Plagiarism” button to start the scan. If you are on a free plan, you will also have to complete the captcha first.

8. Rewrite the Plagiarized content

Our Sentence rewriter rewrites plagiarized content to make it unique. After clicking on the plagiarized sentence, you can click on the ‘Rewrite’ button. This will make your content unique and free from duplication.

9. Plagiarism Remover

SEOToolSystem plagiarism remover option helps you to remove duplicate content. It works sentence-wise and makes your text 100% unique.

10. Multiple language support

You can check plagiarism in French, Dutch, Spanish, and many other languages.

SEOToolSystem plagiarism Detector can be used by


Students can use this online plagiarism checker to find out if their assignments and submissions are free from plagiarism.


Teachers can use this tool to check if their students are submitting the original work or just copying it from the internet.


Researchers have to publish a lot of material for their research.

They should make sure that their publications and research are original, and that they are not accidentally publishing plagiarized content. So, they can perform an instant plagiarism check to ensure the originality of their research by using this free online plagiarism checker.

Content writers & bloggers

Publishing original content is key to higher SEO rankings. Writers, bloggers, and webmasters can use our SEO plagiarism checker to check the originality of their articles before publishing.


How effective is our plagiarism detection software?

Our online plagiarism detector is one of the most accurate and reliable tool available on the internet. Due to its AI functionality, it can even find paraphrased sentences in your text other than the exact matches.

Why should plagiarism be avoided?

You can avoid plagiarism by simply rewriting the duplicated sentences in your work. You can also cite the source or put the particular sentence in quotation marks. However, you can do this after you find out which parts of your work are plagiarized using an online plagiarism checker.

Which plagiarism checker is used by universities?

Different educational institutes use various tools to check plagiarism. Some of them use Turnitin while others can use Copyscape.

Which plagiarism checker is the best in 2022?

The plagiarism detection tool by SEOToolSystem is one of the best tools available in 2022. It provides accurate results and it also has a lot of useful features.

How can I check a pdf for plagiarism?

You can check your PDF for plagiarism using the PDF plagiarism checker by Prepostseo.

  1. Click on the ‘Upload’ button and select a PDF from your local storage.
  2. Solve the reCAPTCHA and hit the Check Plagiarism button
  3. Get the plagiarism report with the percentage.


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