20 Best Plagiarism Detection Tools

Plagiarism detection tool

In today’s fast-growing internet era, writers and bloggers often plagiarize other people’s posts just to grow their blogs. Even students copy online materials and submit them as their projects. This is utterly wrong.

Some people do this unintentionally and as such require a guide that’ll prevent them from plagiarizing when they’re writing projects or blog posts. Fortunately, tons of plagiarism detection tools can help you.

In this post, we’ll take a look at some of the best plagiarism detection tools that can guide you when writing. This post will be very insightful, so endeavor to read it to the end.


Plagiarism detection tools are tools that are used to search a body of text for instances of copying another person’s work. Both free and paid plagiarism detectors inform the author whether their writing has duplicate content also known as plagiarized text inside a text body. 

Most plagiarism detection tools use cross-referencing between open websites and web pages to find plagiarism. When it comes to plagiarism detection software intended for academic use cases, several take advantage of big web databases of published works for cross-referencing.

Other aspects of more sophisticated plagiarism detection tools include warning the author when a piece of their writing needs a citation, offering instructions or tools for structuring citations, and awarding a document a score based on how original the content is. A few of these tools use artificial intelligence to detect plagiarism and can check content in different languages.

Plagiarism detection tools are provided by several manufacturers as a component of a larger set of editing and proofreading tools. For example, Grammarly offers its users a plagiarism detector in addition to tools for grammar, spelling, syntax, writing style, and text sentiment.


A plagiarism detection tool is required for different reasons. They include:

1. Assurance Of Originality

The key advantage of using a plagiarism detection tool is that it contributes to ensuring that the content is original. It could point to instances of plagiarism and offer suggestions for how to rephrase or cite the text.

2. Avoiding Unintentional Plagiarism

Writers may unintentionally plagiarize written material while researching or paraphrasing. Using a plagiarism detection tool can help find and correct any instances of plagiarism before submitting your work.

3. Reducing Time 

When dealing with lengthy texts or several files, manually screening for plagiarism can take some time. A plagiarism detection tool automates the process, saving writers time and effort.

4. Strengthening Credibility

A plagiarism detection tool can help increase the trustworthiness of the author and the paper. A writer’s reputation can be enhanced and their chances of being published or accepted can increase with original and properly recognized work.

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Plagiarism can result in severe consequences and legal action. By identifying and correcting any instances of plagiarism, a plagiarism detection tool can help writers avoid these difficulties before submission.

6. Improving Learning

The use of a plagiarism detection tool can also help students learn how to properly cite sources and avoid plagiarism. By appreciating the importance of original content and accurate citations, students can enhance their writing skills and academic achievement.


From the plethora of plagiarism detection tools out there, below is a list of some of the best. They include:

1. Grammarly

Grammarly is not just popular, it is one of the best writing tools that provides users with suggestions and corrections for grammar, spelling, and style to help them write better. With a paid subscription, you can use the plagiarism detection tool it offers, which has an annual cost of $12 per month or a monthly charge of $30. 

Grammarly makes use of a vast database that contains more than 16 billion online pages. It offers a thorough report of any plagiarism found, enabling you to review and make the required edits to your work. Additionally, Grammarly has a user-friendly design that enables authors of all experience levels to use it.

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2. Plagiarism Checker X

Plagiarism detection tool
Plagiarism detection tool

Plagiarism Checker X is an easy-to-use and accurate plagiarism detection tool. It is one of the top research paper plagiarism detectors that make bulk content comparison easy. it can find copied content using a variety of search engines.

You can easily compare contents side by side using Plagiarism Checker X and it doesn’t share your data. You can import DOCX, DOC, PDF, HTML, and RTF files. It also supports multiple languages, including English, French, Spanish, Italian, and others.

3. Scribbr

Next on our list of best plagiarism detection tools is Scribbr. It is a writing assistant that offers plagiarism, citation, and proofreading services. They have more than 700 staff members who assist writers by checking for plagiarism, creating citations, and identifying grammar and spelling errors. It is a standard in education since it is made to assist students in removing unintentional plagiarism and raising the quality of their work.

Scribbr has a limited free version that is ideal for determining whether your paper might be plagiarized. You’ll have to purchase the premium version, which ranges in price from $19.95 to $39.95 depending on the word count to see the entire report. You can upload a document that is as large as you like because there is no word restriction.

Scribbr also has a Self-Plagiarism Checker which can help you check for any potential self-plagiarism. This special feature enables you to upload your unpublished documents and scan them against the public database.

4. Duplichecker

Duplichecker is a free online plagiarism detection tool designed to detect duplicate content across the internet. The fact that Duplichecker can support a variety of file types, such as PDF, docx, txt, and rtf, is one of its primary advantages. It is a useful tool for authors and academics who operate in non-English languages because it can identify plagiarism in several other languages.

Additionally, it provides a batch search tool that enables you to upload several files at once for review, which can save a lot of time and effort if you have a lot of work to do.

5. Paraphraser

Paraphraser is one of the best plagiarism detection tools as it enables you to determine the percentage of matched text in the manuscript. This tool makes it simple to analyze reports in Word or PDF documents.

It is one of the few plagiarism detection tools that lets you work with friends. It also allows you to add sources or whitelists. Paraphraser allows you to work offline and also lets you upload the paper from your computer or cloud drive for review.

6. PaperRater

PaperRater is a popular online writing and proofreading tool that has a plagiarism detection feature. It can be used for free and you can pay for more features and limitless checks. When invoiced monthly, the premium version is $14.95; when billed annually, it is $95.40. 

The tool is simple to use and comprehend thanks to its thorough report and user-friendly design. It might not be the ideal tool for people who need a very accurate plagiarism detection tool as some users have experienced problems with the accuracy of the checker.

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7. PlagAware

Plagiarism detection tool
Plagiarism detection tool

When considering software from a student’s point of view and taking into account their needs, PlagAware would be the best option on the market.

This tool is excellent at identifying plagiarism in a variety of texts and websites. The software’s features and specifications are enhanced and sufficient to meet the demands placed on them by the academic community.

PlagAware allows you to paste your text directly or use practically any extension, including .txt, .rtf, HTML, .doc/docx, .pdf, and .odt. You can upload 50 files with a maximum file size of 15 MB.

The tool is quite successful at identifying the source of the material you have taken, and it can scan documents up to 750,000 characters, or roughly 350 pages.

8. Plagiarisma

Next on our list is Plagiarisma. You can use Plagiarisma to check your writing for internet plagiarism. Despite the site’s archaic appearance, it is easy to navigate and very effective in detecting plagiarism. This puts it among the greatest free plagiarism detectors available online.

To check text for duplicates, just paste the content into the text box and press the Check for Duplicate button. Files can also be uploaded to the website. You can cross-reference your work with a particular URL. The supported file types are TXT, HTML, RTF, and others. It supports over 190 languages.

9. Quetext

Quetext is a popular plagiarism detection tool that uses advanced algorithms to detect duplicate content in a document. It has a free and paid version that offers more sophisticated features and a bigger database. The tool has a user-friendly design, delivers accurate findings, and can find a variety of plagiarism, including paraphrasing.

If you prefer the premium version, you can choose from several plans starting at $8.25 per month for each user. The enterprise package, which starts at $7.50 per month per user, is an even better choice.

Quetext is compatible with various file formats such as docx, rtf, and txt. Because you can check for grammar and spelling mistakes as well as identify plagiarized content, Quetext is also excellent for proofreading.

The accuracy of Quetext’s plagiarism detection system and its capacity to produce clear and simple results are two of its key advantages. The application also protects the privacy of its users by instantly deleting all papers processed through its servers after a week.

10. WhiteSmoke Plagiarism Checker

WhiteSmoke is one of the best proofreading and plagiarism detection tools and it is incredibly reliable and accurate. To check for plagiarized or unoriginal content in your paper, Whitesmoke examines billions of online web pages and resources.

Although not as well-known or effective as Grammarly, Whitesmoke’s online plagiarism checker is an excellent alternative if you want to give it a try. It advances your content analysis by integrating with browsers, MS Word, and Outlook.

11. BibMe

The BibMe program makes it simple to check a document for plagiarism. You can upload content from Google Drive or your computer. It provides immediate grammatical and stylistic recommendations. You can also make citations using this online plagiarism checker in a variety of formats and score types.

12. Search Engine Reports

Search Engine Reports is a free plagiarism detection tool that both content creators and academics can use. You can upload a file from Dropbox or your computer. It also has a free URL exclusion feature that can simultaneously run up to five URLs and supports 17 different languages.

Once the report has been checked for plagiarism, you can read it on another website and share it. It is also available for download in PDF format. It will provide you with a link to related information if it finds copied content. Through their paraphrase tool, you will also have the opportunity to rework the copied text.

13. PlagScan

Plagiarism detection tool
Plagiarism detection tool

PlagScan is an excellent plagiarism detection tool loved by academic institutions, researchers, and corporations. It offers a free trial as well as a subscription version with enhanced features and a larger database.

PlagScan’s capacity to identify many forms of plagiarism, such as copying and pasting, paraphrasing, and patchwork plagiarism, is one of its primary advantages. 

To meet your demands, Plagscan offers several price options. There are ten alternatives, with prices starting at just $5.99. Private 1 costs $5.99, while Private 2 costs $12.99, for individuals who want their privacy.

If you want more features, Lite is offered for $17.99 per month. You can select a plan with Plagscan that meets your needs and budget. 

The tool is a practical choice for instructors and students due to its user-friendly interface and interface.

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14. SmallSEOTools

SmallSEOTools is a tool for checking text for plagiarism. It is one of the greatest free tools to check for plagiarism and you may upload files in the following formats: .rtf, .ex, .doc, .pdf, .txt, .docx, and .odt. This software can look for duplicate text across many different web pages from your Dropbox and Google Drive.

You can also download and share a plagiarism report with SmallSEOTools. It supports a variety of languages like French, Italian, Portuguese, Spanish, and others.

15. Copyscape

Copyscape is an online plagiarism detection tool that is specifically designed for web content. Bloggers, website owners, and online publishers frequently use this tool to make sure their writing is unique and hasn’t been plagiarized. Several capabilities are available through Copyscape, such as bulk verification and interaction with popular content management systems.

Copyscape compares uploaded content with previously published works to find any instances of copied content using an index of billions of web pages. Additionally, it offers a service called Copyscape Premium that enables users to conduct more thorough searches and plagiarism checks on whole websites.

For their regular service, which searches the internet for copies of your work, Copyscape charges $0.03 for each search. Additionally, they provide a subscription service with extra capabilities including batch search and private index searching. For users with higher search volumes, the premium service is paid based on usage and starts at $0.02 per search.

16. Plagium

Plagium enables you to compare two papers side by side and find areas of overlap in their content. It also assists you in checking your paper and thesis for duplicate content that has been posted online. This aids in determining whether or not someone has plagiarized from social media sites.

17. CopyLeaks

Next on our list of best plagiarism detection tools is CopyLeaks. CopyLeaks is an online plagiarism checker designed for individuals and businesses because it integrates with popular content management system, among other things. The tool has a free plan and a variety of subscription plans with varied features and word counts.

The capacity of CopyLeaks to identify several sorts of plagiarism, such as copying and pasting, paraphrasing, and text rewriting, is one of its primary characteristics. It is a versatile application for customers with various demands because it can additionally check for similarities in a variety of file types, including MS Word, PDF, and HTML.

CopyLeaks also provides a set of tools for text analysis, grammar checking, and proofreading. These capabilities assist users in raising the overall standard of their writing and guarantee that it is original.

Up to 10 pages can be examined for plagiarism each month using CopyLeaks’ free edition. Paid options range from $10.99 for 100 pages per month to $184.99 for 2500 pages per month. There are also specialized business plans available.

18. ProWritingAid

The online plagiarism detection tool provided by ProWritingAid is among the best available. It checks for plagiarism in manuscripts, books, or other literary works. It is one of the best websites for authors and creative writers to verify their work for plagiarism.

ProWritingAid not only functions as a dependable plagiarism detector but also as your writing tutor. It finds over 20 different faults that writers and editors are prone to commit, grammatical and style flaws, and provides corrections.

19. Unicheck

Plagiarism detection tool
Plagiarism detection tool

Unicheck is a good plagiarism detection tool. It promises to have over 40 billion online pages and educational databases to check the originality of your work, and it presents everything in a lovely color-coded way.

For faster access, the Unicheck plagiarism checker includes API access, Google Docs add-ons, G Suite add-ons, and Office 365 add-ons. There is also a personal dashboard that can be accessed from a single browser tab.

20. Editpad

Editpad is another plagiarism detection tool with a user-friendly interface. Editpad does away with the crowded and claustrophobic UI typical of free plagiarism checkers. 

You have to remove URLs before beginning the procedure and only upload files to import content. When the process of checking is complete, you can view a variety of helpful information, including the percentage of originality and plagiarism as well as the number of words, unique words, and sentences in the supplied text.


How much does plagiarism checker software cost?

Individual users looking for a quick and convenient approach to check their writing for plagiarism will benefit greatly from free plagiarism checker programs. Paid plans are typically more suitable for businesses that require a full writing development solution, academic professionals and students, and professional writers because they offer more robust and advanced capabilities.
Depending on how many pages and words need to be tested for plagiarism, costs might range from $20 per month to $100 per month.

Are plagiarism detection tools reliable?

Your choice of plagiarism checker will affect the accuracy. Many free plagiarism detection tools fall short of identifying all instances of plagiarism or mistakenly labeling content as such. Advanced database software is used by plagiarism detectors to search for similarities between your text and previously published texts. The algorithm that detects plagiarism and the size of the database that your document is compared to determine how accurate these tools are.

How effective are the free plagiarism checkers?

No matter what plagiarism software or websites tell you upfront, free plagiarism detector tools are not even close to as effective as ones that cost money. If you notice, the majority of plagiarism detectors’ free versions feature an upsell to a subscription plan. Free plagiarism checkers are ineffective because of this.


A reliable plagiarism detection tool needs to be more than just a tool for spotting copied material; it ought to be a collaborator in upholding the integrity of your work. This makes it vital to choose the best. We hope our post was as helpful as promised. Feel free to let us know what you think in the comment section below.

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