Let’s learn about everything bit by bit. Plagiarism means when people use or closely imitate the language or thoughts of another author or writer without asking her or his permission or authorization and representing those thoughts or language as their own is called plagiarism.

Plagiarism Checker Tool

 A plagiarism checker tool is a tool that is used after writing an article, blogs, etc. This tool prevents plagiarism.

This tool is specially made for authors, students, instructors, webmasters, etc. to check assignments, newspapers, essays, thesis, posts, etc.

This tool scans your content and compares it with online information or database or published content on the web to find plagiarism.

List of Plagiarism Checker Tool

Let’s take a look at the list below of plagiarism tools-

  • Grammarly
  • Pro Writing Aid
  • White Smoke
  • Copyleak
  • Copyscape
  • Viper
  • Plagium
  • Unicheck
  • Dustball
  • Webconf Tool
  • Small SEO Tool

The list is never-ending! According to my experience, these are the top 12 free plagiarism checker tools among the tools I have used until now. 

Best 6 tool to Check Plagiarism

1. Grammarly

According to my experience of content writing, Grammarly is the best plagiarism checker tool to date! It is suitable especially for students and teachers. It has a huge database with billions of web pages.

Free 6 Best Plagiarism Checker Tools in 2021

Grammarly recognizes plagiarism with an instant scan of documents or articles, etc. It is an automated proofreader and plagiarism checker.

I have been using Grammarly a lot, it has always given me accurate results. Therefore, I would recommend Grammarly to everyone. Grammarly is available for free as a browser extension and also as offline MS Word add-in, and Outlook integration.

Grammarly plagiarism checker is undoubtedly the best online plagiarism checker for students and teachers with a percentage score.

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2. Duplichecker

My second recommendation would be Duplichecker. Duplichecker is one of the best plagiarism checker tools for teachers, writers, etc. It is a free plagiarism checker tool.

Free 6 Best Plagiarism Checker Tools in 2021

This is a helpful tool for students who have daily assignments to submit or who are pursuing content writing as their profession.

 In this tool, you just need to paste the text in the given box and you need to click on the option ‘check for plagiarism’ on the top page and it will show you the accurate results. You can even upload a whole word document at once. More than 50 scans are available each day in this tool.

Duplichecker is very easy to use therefore, you don’t need to learn anything specifically to operate this tool. The only problem is that the search limit is about 1000 words.

3. Quetext

My next recommendation would be Quetext. Previously, quetext had a basic duplicate checker but now it has developed a lot. There are a lot of features available in the free version of this tool.

The specialty of this tool is, it not only checks duplicate content but also checks contextual plagiarism. This makes the best tool for students because it makes the essay or the content error-free.

Free 6 Best Plagiarism Checker Tools in 2021

 According to my experience, quetext has a better sense of catching plagiarism of any context easily than any other tool. You can upload up to 5 files at one time for bulk checking.

You can enjoy all the benefits of quetext free version except for the deep search technology. Deep search technology is available only in the paid version of quetext.

4. CopyLeak

My next suggestion would be Copyleak. Copyleak has a unique function that is not available in other plagiarism checker tools. It has a unique ability that not only shows you plagiarism but also shows you who the thief is! who has stolen your content?

Free 6 Best Plagiarism Checker Tools in 2021

This is a great feature. This way you can protect your content at the maximum level and earn compensation as well.

It has a huge internal database which is very beneficial for the users. The only problem is that copyleak allows you only 2500 words to scan per month.

5. Copyscape

The next tool is Copyscape. Copyscape is the fastest plagiarism checker tool you will ever come across. It takes only a few seconds to scan and to give accurate results.


This tool is quite different, instead of showing you, it detects who has copied your content and published it online. This tool provides banners and badges for your site as well to protect your content from getting stolen. It has a simple user interface.

 Copyscape is one of the most popular and widely used plagiarism checker tools. It is one of the top checkers when it comes to checking duplicate content.

You just need to enter the URL of your website and you will get to know who is copy-pasting your content.

6. DustBall

My next suggestion would be DustBall. Dustball is a free paragraph checker. In the premium version of Dustball, it claims that it gives 3 times more accurate results.


You can read information from Wikipedia and other sources and write your article in your own words. This won’t get a count as plagiarism. Copying word-to-word content from different sites and declaring it as your own would be wrong and it would be considered plagiarism.

Preparation For Plagiarism Free Content

To write plagiarism-free content you just need to do your research according to your way and write your contents using your vocabulary and the best of your words. You can use others verses and points but you need to tell it to other people in your way.

To know if you are plagiarized or not, you just need to scan your documents from the plagiarism checker tool given above. If the plagiarism report is 10% or less than that, then it would not be considered an offense or crime, if it exceeds more than that then you should check your content whether you have copied more than the limit or not.

 So, this was my review for the best free plagiarism checker tool in 2021.