10 best free online plagiarism detection programs

10 best free online plagiarism detection programs

A plagiarism checker is a tool widely used in education by students and teachers to verify the originality of a submitted work. It is used in all types of work, but especially in those that are done to complete the course as happens in the undergraduate or postgraduate degree with TFG or TFM.

But the plagiarism detector it is also a very useful tool in marketing and brand communication, as this allows us to monitor other web pages that partially or fully use our content, which may also be an illegal practice if you do not have our consent.

We can also use it to track mentions of our brand and thus analyze our reputation online.

While it is for education or for digital marketing, here is the list of what I consider to be best free and paid plagiarism detectors.

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What can we do if we detect partial or total plagiarism of any of our content?

Plagiarism is something that we have unfortunately come across before when devoting ourselves to content creation, whether it’s for a blog, website or social media, but you should know that no one can use the content that you have. created and therefore has your author, without your permission.

I will therefore explain in a simple way the steps to follow in case we have detected a partial or full copy of one of our content:

1.- Contact the source to remove the plagiarized content. These days it is very easy to find a way to get in touch with the person who has used your content without permission, so we send them an email, comment, message through social media.

2.- Wait a sufficient time. If we don’t get a response, keep pushing and email, comment, or message them again and wait a week or 2 for a response.

3.- Report spam through Search Console. In our webmaster tool, we can report plagiarism of our content and a technician will review it in a few days and give us an answer. If Google considers this to be plagiarism, it will classify it as spam and therefore, it will de-index the search engine.

In this URL, you can report someone who plagiarized content as spam:


You will need a Google Account to be able to report spam to another website.

Free online plagiarism detection programs

last name Limit Observations Access
EduBirdie No Very complete and with a mobile application To access
Plagiarism checker 1000 words Very useful advertising but a little boring To access
Dupli Checker 1000 words Complete and easy to use To access
Plagiarism detector 1000 words Very complete and analyzed grammar To access
Plagiarism detector 1500 words Complete and easy to use To access
Unickeck 200 words Very limited free version To access
stroke 1000 characters Very limited free version To access


It is one of the most comprehensive free online plagiarism checkers I have ever seen. The operation is simple, it can be compared to any text document and find plagiarism or copies online.

The tool is completely free and has no ads which is appreciated and makes it very easy to use.

It is ideal for students, educators, and marketers who want to analyze and find copies of their work.

small SEO toolsPlagiarism checker

This program is a great option for detecting plagiarism in text. The free online version only allows you to compare 1000 words in each search.

It allows us both to copy text to an empty box and to compare from a text document.

A very effective way, especially if we are referring to the analysis of plagiarized content via the web, is that it allows us to add a URL and find other websites that have plagiarized some of the content.

duplicatorDupli Checker

This plagiarism detection program has a free online version which allows us to analyze up to 1000 words and a paid version which allows us to analyze up to 10,000 words.

Like the previous program, it allows us to copy the text we want to compare, download a text document or compare it via a URL.

Each of these 2 options are very good tools if we are talking about a plagiarism detector.

Plagiarism detectorPlagiarism Detector (Plagio Detector)

Very good program to detect plagiarism of any text or url. The free version allows you to analyze up to 1000 words and the paid version up to 25,000.

It is a widely used tool and you will be able to compare a file you download, URL or text you copy. Within seconds, you will be able to detect other URLs that have partially or fully used the compared content.

Plagio Detector search engine reportsPlagio Detector search engine reports

The free version of this plagiarism checker will allow you to analyze up to 1500 words.

You will be able to compare text from a URL, from a text that we copy or through a text document with which we will compare it.

Very easy to use and simple to obtain a good result.


The free version of this tool is somewhat limited since it only allows us to analyze a text of 200 words maximum.

It has a paid version whose price will depend on the pages or texts that you want to compare.


Plagium is a good online plagiarism checker, which you can use for free up to 1000 characters or for a fee.

It allows you 2 types of quick scans that give you results in less than a minute or in depth, for that second you must have an account created with the tool.

The results it finds will tell you how similar your text is.


I end the list of free tools with one that helps us detect plagiarism in our images.

Any work or content contains images, because with this tool you can do a reverse search and analyze which other websites the same image we used appears in.

Online and paid plagiarism detectors


Scribbr’s Plagiarism Checker finds similarities between your work and a multitude of digital and academic content.

In a few minutes, you will be able to see and detect if you have any plagiarism in the document.

Prices vary and fluctuate depending on the length of the document we want to compare.

Viper Plagiarism DetectorViper Plagiarism Detector

Compare your text with up to 10 million sources to find all the plagiarism it contains.

The tool produces a clear and concise report with any plagiarized references it finds.

It works at the credit level, so you can buy the credits you need without having to make monthly payments.


Plagiarism is something that no matter how careful you are, someday you may see up close, and you need to take steps to protect your content and work from being audited.

Virtually most universities have plagiarism analysis and detection tools that tell the professor before you even open the job if he has plagiarized any part of your TFM or TFG.

I still remember when I started suffering from plagiarism with my blog and I created with blogger friends a group on Facebook to help us and fight against plagiarism. Look for something bad, a good and positive initiative has emerged to fight together against the misuse of the classic “copy and paste” or “copy and paste” in our works or content.

Hope this will help you find plagiarism in an easier and easier way.

What is the best free plagiarism checker?

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