Best Plagiarism Checker Tool Online Free

Search Engine Optimization

Plagiarism Checker

Paste your article at below box then click Check for Plagiarism!

(OR) Select a file: (.docx/.txt)

Upload a Document Import from Dropbox Import from Google Drive

(OR) Paste your website URL here

Maximum 1000 words limit per search.
Total Words: 0


About Plagiarism Checker

What is Plagiarism & Plagiarism Checker?

According to Oxford dictionary, meaning of Plagiarism is “ The practice of taking someone else's work or ideas and passing them off as one's own.” In other words, plagiarism is an act of fraud.

But there are many other meanings as follows.

  • To steal and pass off (the ideas or words of another) as one's own
  • To commit literary theft
  • To present as new and original an idea or product derived from an existing source
  • To use (another's production) without crediting the source

What about images, videos, and music?

Using an image, video or piece of music in a work you have produced without receiving proper permission from original creator or providing appropriate citation for the creator is considered as plagiarism.

Following activities are very common in today’s digital society regarding images, videos, and music.

  • Copying any media like images, audio and video from other websites to use them in your own websites or blogs.
  • Using copyrighted music as soundtrack in your videos.
  • Making a video using footage from others’ videos.

Plagiarism Checker:

Finding plagiarism has become as easy as detecting information in Google.  With free plagiarism checker tool you can search for billions of documents, and find matches which are related to your content.

Plagiarism Checker tool is a perfect platform to check for plagiarism, in order to verify the integrity of the content.  Our plagiarism checker tool at SeoToolStack is trusted by millions of people all over world, who use it daily as a part of their studies or work.

How does the Plagiarism Checker work?

All the readers have to know the first that, the plagiarism Checker tool doesn’t actually detect plagiarism but instead, they actually identify fragments of identical text. There are a variety of techniques for checking plagiarism, but the end results for every technique is almost the same.

Plagiarism software processes the text to find matching sections of words in the document it is processing and the ones it has indexed in its databases. This is true for every plagiarism test tools such as the plagiarism checker free online tool offered by Seo Tool Stack.

Most of the plagiarism checker tools works on the same plagiarism test principle and basically works very much the same as Google or any other search engine works.

Why is Plagiarism Checker Important?

If Duplicated content published in your website, it will results in a lower page rank. Sometimes it significantly becomes higher risk of being blacklisted by Google and other many search engines. If your goal is to have a higher page rank– and search engine results placement (SERP) then it will not worth the risk of publishing heavily duplicated content.

While this free plagiarism checker at will be used for checking rewritten or spun content to eliminate consistencies its benefits aren’t only restricted to Black and Grey hat SEO techniques. In fact, white hat SEO specialists rely on this free plagiarism checker to make damn sure that their freelance writers are submitting content that is 100% unique and original.

You can always check content on your own website and others websites to make sure that nobody else has been ripping you off!

There are many uses for this tool beyond search engine optimization.

Students more frequently use this tool to check papers for missing citations before submitting or publish their article. Meanwhile, teachers use this free tool to check for plagiarism in assignments submitted by the students.

Our free plagiarism software tool checks all sentences one by one on various search engines by comparing it with already indexed content. However, our plagiarism checking tool does not save any content in our database.

You can sign up with us for free.  We will update you time to time with our latest developments and improvements in the tools at through newsletter.

Follow these steps to check plagiarism here:

  • Go to
  • Search for plagiarism checker in search bar.
  • You can upload content by uploading a document, Import from dropbox, import from google drive or you can paste your website URL or paste your article in the provided text area.
  • Then, click on “Check for plagiarism”
  • It will take a while to process the article.
  • Then finally it will show the per cent of Unique Content. The result will also show that which sentence is copied.
  • Try New Document to check plagiarism for another article, because it totally free to check plagiarism at

With our free plagiarism tool, we believe that we are playing our part to make your SEO world a better place