Free Plagiarism Checker for Teachers Online

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Formal Definition: An online Plagiarism Checker is a program or a service which searches millions of text, pdf and doc databases accessible on the internet to find the copied piece of content in your document.

Paid vs Free Plagiarism Checkers

This is a long discussion among people that which plagiarism checker is good and efficient enough. A free checker like Copyscape or smallSEOtools or a paid one like proWritingAid or Grammarly.

Many consider the free plagiarism checks are as powerful as the paid ones. However, this doesn’t seem correct in the current scenario.

Here are the reasons:

  • Plagiarism checkers search online records for similar phrases in them. However, not every paper and document which should be looked into is present and accessible.
  • Almost every time, free tools search in Google Scholar and other search engine databases to find the plagiarism. However, the real scene of the crime may not lie there.
  • Since most of the internet resources are inaccessible to the search engines, your free plagiarism checker may output false correct results.
  • For a simple website, blog or a lowquality essay submission, it is all right to use a free tool. But if this is an important research paper you should go for a paid one to avoid risks.

Risk With Free Plagiarism Checkers available

There is no such thing like a free lunch.

Since every tool you are using is a business for someone. He or she must earn something from it if he has put efforts to creating it. Some free plagiarism checkers may keep your data when you are using their tool and then sell it to the other sites.

Now, this is veryvery dangerous because your paper is plagiarized when they do it.

Here are some of the best (free and paid) plagiarism checker for teachers available to use online. We have tried to add the Software which also tells the percentage of plagiarism in the article. This kind of tool helps to manipulate your content if there is a maximum plagiarism limit is pre-defined.

Online Plagiarism Checker for Teachers and Students (With Percentage)

ProWritingAid is one of the premium choices of web content writers, teachers, students, and researchers. Even though they are not free like Viper, you get some of the interesting advantages.


    1. Editing Tool suggests worthy styling improvement while writing.
    2. They don’t save your content so you need not worry about self-plagiarism risks*.
    3. The cost of using ProWritingAid is low as compared to the other substitutes.
    4. Regular reports will help you to improve and reduce further errors.
    5. Available for nearly every browser and device you use for your writing including Google Docs, Chrome, Windows and Mac.
    6. Have a trial period and money back guarantee.Writing Improvement Software

 Grammarly is perhaps the most popular editing, spell-checking and plagiarism checker tool on the net. The best part of this multi-purpose copied content checker is its utility. Here are some of the advantages you will receive out of the box. You can use it for free.

    1. Free Spelling checker. (needs free account)
    2. Free synonyms and writing suggestions. (needs free account)
    3. Cheap Service for plagiarism checker tool.
    4. Proofreading service available.
    5. Compatible with almost every writing platform.
    6. Have a money back guarantee if you are not satisfied with the product.
  • Viper – An Anti-Plagiarism Scanner:

Now one of the most loving products of web content curators. It is completely free but as I said earlier there is no such thing as a free lunch“, your data will be used to compare other content for plagiarism checks after 3 months. Since 3 months is a big time period, it is perfectly fine to use Viper if you think you don’t need your article after 90 days.

SmallSEOtool is again a completely free plagiarism checker available online. It works great for small publishing like a blog and low-quality submission.

Since most of the tools come with a fixed number of word limit you can check, this tool will be helpful to use along with them. SmallSEOtools also provide some of the crucial services other than copyrighted content checking like Google ranking for a specific keyword and grammar checker tool as well.

Copyscape is a tool you will always hear about when it comes to the basic plagiarism check. You need to enter a URL and it will output how many of other websites have the similar content like yours. Here they don’t provide a space to write your article or to upload your document.

You Need to save it on your personal or someone else’s servers and then put that URL on their input bar. It is very simple and straight forward system to use.

Nowadays, everyone is searching for the alternatives of Turnitin. But still, the popularity of Turnitin is not falling to the earth. This is the first tool for checking plagiarized and stolen content checking and reporting.

However, this website uses your content to compare and provide your content to the other sites after a certain time period, this is again vulnerable to the self-plagiarism risk*.

A very few of us know that CrossCheck from IEEE is now available to check for multiple submissions and plagiarism in the submission for teachers and students. It is also available through APIs and by their direct portal.

Self-Plagiarism Risks: Some of the websites save your article when you use their tool to check plagiarism. These websites use this content to compare other documents and provide it to other users to compare their content as well. However, they claim to not use this data until a certain period of time, this may lead to self-plagiarism dangers to you.

Next time, whenever you will try to use this content to submit somewhere it would be already available online and might cause plagiarism.

Which is the Best Choice for Teachers?

Many academicians will agree that the war against content privacy is a never ending battle. Since only those content can be checked online which are present online, no tool can be 100% correct. However, ProWritingAids, Grammarly, and SmallSEOtools are what you need to use according to me. If you only want to check in the IEEE databases using CrossCheck is also a preferred choice.

As a teacher, you need to evaluate the originality of the content you are getting from your students, choosing Grammarly or pro writing aid will be a good option.

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