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15 Best Free Online Plagiarism Checker Websites

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Plagiarism according to Dictionary.com is an act or instance of using or closely imitating the language and thoughts of another author without authorisation and the representation of that author’s work as one’s own, as by not crediting the original author. As a scholar or student in the University, we are constantly engaged in other people’s work, sometimes, out of desire to create something new that is our own, we still engage in other people’s ideas embedded in texts, images and videos and try to incorporate them into our own work, there’s nothing wrong with this but in doing this, it is very important that we give credit to whom credit is due. Plagiarism simply means the use of other people’s work without acknowledging them as the source of the information.

ACCORDING TO THE MERRIAM-WEBSTER ONLINE DICTIONARY, TO “PLAGIARIZE” MEANS

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

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Plagiarism is  the “wrongful appropriation” and “purloining and publication” of another author’s “language, thoughts, ideas, or expressions,” and the representation of them as one’s own original work

Although Plagiarism is not a crime per se, it is also different from copyright infringement but in the academic field, it is a serious moral issue, and cases of plagiarism can constitute copyright infringement.

How to Detect Plagiarism Online

There are now several free tools or free plagiarism checker websites available that can help you detect plagiarism online, listed below are the popular ones:

Top 15 Best and Free Plagiarism Checker Websites

1. TurnItIn

Turnitin is very popular among University students, Turnitin works by checking your papers against 24+ billion web pages, 250+ million student papers and 110,000+ publications, this tool was developed when four UC Berkeley graduate students designed a peer review application to use for their classes — the rest is history, as at the time of this writing, it serves

  • 1 million active instructors,
  • 20 million licensed students and
  • 10,000 educational institutions.

It also has

  • 24+ billion web pages crawled
  • 250+ million archived student papers
  • 120+ million articles from 110,000+ journals periodicals & books

Turnitin customers are located in 126 countries, it also offers WriteCheck service which helps students maintain proper citations and access various writing tools.

turnitin

2. iThenticate

iThenticate is a service offered by Plagiarism.org, it’s a professional plagiarism detection and prevention technology tool that is often used for professional writing and scholarly research. this tool enables editors, researchers and writers to prevent plagiarism, it works by comparing  its database of over 32 billion web pages and 125 million content items, iThenticate is developed by Turnitin and is headquatered in Oakland california.

ithenticate

 3. PlagiarismCheck

This website provides free services that include things like checking unlimited number of papers and the generating plagiarism reports, it is fast, smart and can accept all kinds of file formats, it provides means for you to  download plagiarism reports instantly anywhere in the world, the downside is that it doesn’t come with a warranty, it also requires you to create an account, free account though.

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PlagiarismCheck

 4. Viper

Viper is one of the best free plagiarism scanner on the Internet, it is a “Free TurnItIn Alternative.” that is able to scan a large database of academic essays and other online sources, it also offers side-by-side comparisons for plagiarism, Viper plagiarism software is only available for Windows users

viper_scanmyessay

5. The Plagiarism Checker

All that is required with this is to cut & paste your student’s paper or homework assignment into the box below, and click the “check” button. This free plagiarism detector will find plagiarized text in homework and other essays/reports. This is suitable for everyone whether they are students or not, there’s also Premium version which offers more powerful detection

dustball

 6. Small SEO Tools – Plagiarism Checker

This is one of the tools from Small SEO tools, a website that provides so many free search engine optimization tools, with small SEO plagiarism checker tool, you can check content from your own website to make sure nobody else has been ripping you off, simply Paste your article and click ‘Check Unique’. After that, you will notice the percentage which shows the degree of your article’s uniqueness.

small_seo_tools

 7. PlagiarismChecker.com

This tool makes it easy for you to check for copied work by pasting phrases from an article into a search box. Apart from the search box showing on the homepage, you can equally check a webpage by clicking the second link on the top – this is designed with publishers in mind, it can also search through either Google or Yahoo, you can also create Google Alert to be able to receive emails whenever new posts similar to yours are detected online.

PlagiarismChecker

More Free Websites For Checking Plagiarism Online

8. Plagiarism Detect

PlagiarismDetect.com is an online plagiarism checker. By online, it means that you do not have to download or install anything, it detects and scans text at a rate of $0.50 per page for premium plagiarism scan, the standard plagiarism scan can scan at  ¢10 (1 credit) for a one-page scan (i.e. 275 words)

Read more about this tool for teachers or authors.

9. Dupli Checker

This is one of the best ever free plagiarism detection software which does not require registration, apart from the fact that it enables you to scan your work for plagiarism, it also provides a lot of useful information and tips on plagiarism, simply copy and paste, click search and you’re done.

10. Plagiarisma.net

This website supports over 190 languages, it also comes with a search box and a software download for windows users, this tool is very efficient and can check for duplication by Babylon and Yahoo! is limitless, however search by Google requires a free registration. You can search for entire URLs and files in doc, docx, txt, odt, html, rtf and pdf formats.

11. Article Checker

Despite the not so organised look and feel of this website, it is still very valuable, it has three boxes, the first and third box enables you check a webpage while the one in the middle allows you to paste texts/written words.

12. CheckForPlagiarism.net

If you are looking for an effective plagiarism checking service, and want to make sure of it before spending your hard earned money, then CheckForPlagiarism.net might be what you are looking for

13. Search Engine Reports – Plagiarism Checker

This is a free tool that checks the web for plagiarism of your content, simply paste your text in the text box, then press the button, you can also adjust the sensitivity of the search by using the slider bar, you can be able to check text, webpage or file

14. EVE2: Essay Verification Engine

If there’s one thing going for EVE2, it is it’s speed, the EVE plagiarism detection system is one of the older services on this list and has performed over 150 million scans since it was created in 2000

15. Tuition

ITS Tutorial School decided it was time for them to provide a resource rich website for students, teachers and parents, the school then decided to create a free plagiarism checker.

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