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10 Best Online Plagiarism Checker Tools to Curb Duplicate Content


Our content is free. We sustain the blog through affiliate links. We earn a small commission when you purchase recommended products through our links, without any additional cost to you. Learn More

In today’s post, we discuss, in detail, 10 Best Online Plagiarism Checker Tools to Curb Duplicate Content. Read on or pin this post for later.
Best Online Plagiarism Checker Tools

As an online entrepreneur whose business is powered by content, you’ll agree with me that your success is largely dependent on the uniqueness and quality of the content that you use on your website. Whether it’s your web copy or blog posts, you need original content.

Now often times, especially if you are outsourcing your writing from content mills, you may come across content that is plagiarized. This is when someone’s present someone else’ work as their own. Now this is unethical and you don’t want that content on your own site. And besides legal issues, Google sees this as duplicate content and does doing more harm than good for your business.

You can easily check whether a particular content is plagiarized using online plagiarism checker tools. Some of these tools are free to use, while others are premium.

In this article, I share with you some of the best online plagiarism checker tools.

1: SmallSeoTools

SmallSeoTools is a very famous utility website that provide a suite of tools, amongst them is its own plagiarism checker tool. Simply copy and paste your content into a text box and run the plagiarism test.

You can even detect plagiarism in content files in different formats. To do this, simply upload your document and start running the test. Currently, you can upload these document types: .tex, .txt, .doc/.docx, .odt, .pdf, .rtf. If you have these documents in Google drive, then you can upload them from there as well.

What many people don’t know is that, with SmallSeoTools, you can exclude a particular URL when running a test.

This may prove useful if you have an article on your website and wants to check if someone else has plagiarized your content. Simply exclude the URL where article is published on your website and then go ahead to run your plagiarism test.

2: Duplichecker                          

Duplichecker is a lot like SmallSeoTools’ plagiarism checker except that it does not allow you to exclude some URLs. You can check up to 1000 words per search for free.

To carry out more than one search per day, then you need to sign up for their free account. Once you’ve done that, then you can do up to 50 searches per day.

3: SearchEngineReports

With SearchEngineReports’ plagiarism checker, you can check up to 1500 words per search without known daily limits. 

Apart from ability to check by URLs, you can actually exclude up to 5 URLs for every when running your test.

4: PlagiarismDetector

PlagiarismDetector is designed more as a premium rather than free tool, thus more powerful checking systems. With free version you can check up to 1000 words per query.

PlagiarismDetector allows you to exclude particular URLs just like SmallSeoTools plagiarism checker. For a smoother experience without annoying ads, and to increase the check limit to 25000 words, you need to get a pro subscription

5: Grammarly

If you are a content creator, then you’ve probably come across this handy writing tool. Though it’s mainly known for its proofreading tools, Grammarly also has a powerful plagiarism checker.

The plagiarism checker feature of Grammarly can help you check all kinds of duplication in your work and that too with great accuracy.

6: PaperRater

Free but effective tool, The PaperRater gets you results quite faster. You can check up to 5 pages but you can upgrade for a monthly subscription and even get faster processing times.

7: Copyleaks

If you are looking for a more accurate and robust plagiarism tool, then Copyleaks may be a good option for you.

You get to enjoy more detailed results powered by their powerful AI algorithms compatible with 100+ languages

Unlike most of the tools mentioned here, Copyleaks is designed more as a premium tool, rather than a freemium. That said, you can still get 10 free monthly scans after creating a free account with them.

8: Plagscan

PlagScan is mainly recommended for students and educational institutes. It may not have the best of the User interface, but it does have a powerful algorithm.

And you haven’t guessed it already, this is a premium tool. They do however have a free trial that gets you 20 PlagPoints that you can use to check up to 2000 words.

You can check content via small portions of text, files and even URLs with this online tool!

9: Quetext

Quetext allows you to check up to 500 words online. One thing to note is that Quetext has a really cool minimalistic interface. Since it’s powered by its Deepsearch technology, you are guaranteed of more accurate results.

You can either check your content by pasting within a text box or by uploading a file.

10: Turnitin

Turnitin is a famous and one of the most trusted and respected plagiarism checker software program that comes in different packages.

It’s specifically designed for educational institutes and big content marketing firms.


While you trust that your writers will do their due diligence to provide original content, you can never be so sure. Depending on your needs, you may not need a robust AI-powered tool, but you do need to ensure that content that goes out to your website or your clients’ is original content.

Use AI to generate unlimited social media copy, sales copy, email outreach, SEO blog posts and web content for different use cases

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