Plagiarism Checker

Prepostseo's plagiarism checker detects duplicate or copied content from your documents and shows the percentage of plagiarism along with the source.

  Upgrade Level
Go Pro
  • Deep Search
  • No Ads
  • Support
  • Accurate Reports
  • Check Upto 25,000 Words
  • Go Pro
upload Google Drive
  Upgrade Level
  • Deep Search
  • No Ads
  • Support
  • Accurate Reports
  • Check Upto 25,000 Words
  • Go Pro
Check Plagiarism

Is this tool helpful?

Minimum characters limit 10

Plagiarism Checker Free

Plagiarism checker by Prepostseo is a free online tool that helps writers and students to check their documents for plagiarism. It check plagiarism and display results with percentage.

The words Limit For Our Plagiarism Checker is Explained Below:

Visitors  (Free but Unregistered) 1000 words
Basic Users (Free but Registered) 1500 words
Basic Premium Users 5000 words
Standard Premium Users 15000 words
Company Premium Users 25000 words
Organizations / Enterprises Unlimited words

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 plagiarism.org

How Does Our Plagiarism Checker Work?

Our online plagiarism checker detects copied content and provides the matched sources.  It also generates plagiarism reports with percentage.
Prepostseo’s plagiarism tool checks content from online-available resources using search engines.
Our plagiarism detection tool  assists you to detect similar content across the web. Our tool can also detect paraphrased content. 
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 also upload a file. Click on the Upload (Upload icon)  button to select a document from local storage or import files using the Google Drive (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 quoted text from the plagiarism check by clicking on the Exclude Quotes checkbox.
  • Hit the Check Plagiarism button to start plagiarism detection. 

Understanding the Results

Our plagiarism scanner provides the following details in results.

Percentage of plagiarized content
This is the exact percentage of plagiarism found in the content. The paraphrased plagiarism percentage is also added to it.
Percentage of unique content
It is the percentage of unique content in the given text. Both plagiarized and unique percentages displayed at the top of the result section.
Exact phrase match
In the results, you can check from which paragraph a specific line matched. Exactly matched lines and phrases will be underlined in red by our plagiarism checking tool.
Matched sources
By clicking the Matched Sources tab, you can check all URLs and documents from where plagiarism is found. 
It can also be done by clicking on any of the red-underlined sentences/phrases.

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. Our tool supports various file types such as .doc, .docx, .pdf, .txt, etc.

2. Exclude Specific URL

Our plagiarism checker allows you to exclude specific websites and webpages from being detected. This can be useful if you want to ignore your own website from being scanned when checking for plagiarism.

Exclude URL

3. Exclude Quotes

The ‘Exclude Quotes’ option is available to stop the tool from checking quoted content for plagiarism. It helps to get a more accurate plagiarism percentage.

Exclude Quote option

4. Word Count and Clear Field Option

The words of the content are calculated in real-time to confirm how much text you are checking. If you want to clear the field for a fresh start, you can click on the Delete icon to erase the input.

5. Ensured Content Safety

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

6. Plagiarism Reports with Percentage

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

7. Results with Sources & Percentage

  1. Our copyright checker underlines the plagiarised text and gives the matched sources of plagiarism.

  2. Gives the percentage of plagiarized and unique content.

    Plagiarism checker with percentage

8. Make the Content Unique

After checking for plagiarism, click on the Make it unique button.

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

Make it Unique option

9. Deep Search

Our duplicate content checker uses deep search algorithms to check plagiarism online.
We provide a free online plagiarism checker with percentages that help you scan original and copied content.

10. Easy to Use

The plagiarism checker online by Prepostseo is very easy to use and is 100% free. Using our tool’s features is very simple and the process is quick. You just have to paste content (or upload documents) and click on “Check Plagiarism”. 

11. Rewrite the Plagiarized Content

Our sentence rewriter rephrases plagiarized content to make it unique. Click on the plagiarized sentence, then click on the ‘Rewrite’ button to make content unique and free from plagiarism.

Rewrite the Plagiarized content

12. Citation Generator

Create citations for your text quickly and easily using the in-built citation generator. To use, simply click on the plagiarized sentence and then select the ‘Cite it’ option to open the citation generator.

Generate citation for plagiarized content

14. Multiple Language Support

Check plagiarism in French, Dutch, Spanish, and many other languages.

15. Chrome Extension

Our free plagiarism checker offers a Google Chrome Extension. It helps to check the originality of content from any webpage without visiting the actual tool itself.

16. Plagiarism Checker API

You can integrate our plagiarism API with your website or online platform for smooth and seamless plagiarism detection.

17. WordPress Plugin

This plagiarism check is also available as a WordPress plugin. You can set it up with your WordPress website to check for plagiarism easily.

18. Mobile Apps

You can download our mobile app on your phone and check plagiarism anywhere. we offer:

19. Desktop Application

Our plagiarism checking tool is also available as a desktop application. You can use it as a:

Prepostseo 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.

How 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 Prepostseo 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.

Feedback from our users

Prepostseo has 90,000+ happy clients including Webmasters, College Students, University Teachers and Content Writers around the globe. Positive feedbacks from previous customers are enough proof that we have the most accurate Tools.


Well, a lot of online free plagiarism checkers are available but no one provide the accurate report. Those who claim to produce, their reports are either poor or untrustable. As a writer, I have to write100% unique content and need to show the reports to my clients. Prepostseo is the perfect plagiarism report generator that I ever found on the internet. Now I'm stress-free about plagiarism reports.

~ Aimee ~
Writer, freelancer


PPS plagarism checker is best and easiest plagiarism scanner available. I have to check my papers on regular basis because plagiarized assignments are not acceptable. Thanks for your great effort to make this tool free for normal users.
it's the best online Tool i have ever used. Very fast and accurate.

~ Asad Ahsan ~
CEO, xclicx


I was always worried about posting articles to my blog because I was unable to find a premium quality plagiarism analyzer. But I am thankful to the whole team of prepostseo who made this awesome tool.

i think this is the only single tool available on internet that check content deeply.

~ Muddsar Sardar ~
Manager, KRT Solutions