7 Best Plagiarism Detector Tools

Plagiarism occurs when content is duplicated or spun from another source that has previously been published. This is not a serious offense, but it can result in a copyright violation.

To determine whether your work is original, even when you haven’t stolen or borrowed references from another source, some sentences in your content might appear duplicated or plagiarized. There is some plagiarism-checking software available on the market.

Explain what is plagiarism

Plagiarism is defined as presenting somebody else’s work or ideas as your own, regardless of their authorization, by implementing this model without giving full credit. This definition captures all published as well as unpublished content, whether in printed, handwritten, or electronic form.

Plagiarism can take numerous forms, including:

  • Self-plagiarism is the practice of reusing your previous work.
  • Global plagiarism is when you pass off another person’s entire text as your own.
  • Plagiarism is defined as rephrasing anyone else’s ideas and presenting them as yours.
  • The act of directly duplicating someone else’s words is known as verbatim plagiarism.
  • Patchwork plagiarism is when you use elements from multiple sources to produce your composition.

What is a Plagiarism Checker Tool?

A plagiarism checker scans for matches between the text as well as existing texts using complex database tools. Universities utilize them to scan student assignments. You could also employ professional plagiarism checkers to examine your work prior to submitting it.

1. Quetext

Quetext offers a straightforward and easy-to-use user interface. You must select “Check For Plagiarism.” Copy your work into the provided box, and subsequently click “Check for Plagiarism” again to receive outcomes in minutes!


Rapid Identification: Quetext’s application combines pace with DeepSearch technology to provide accurate, timely, and precise results.

DeepSearch Engineering: Word placement, Contextual analysis, plus our sophisticated algorithms make proofreading easier than ever.

Excellent Privacy: Quetext backs cutting-edge technology with a three-pronged commitment: physical, management, as well as operational security safeguards.

ColorGrade User Reviews: Using analogous hues that distinguish the text and its plagiarism status, you can quickly differentiate between precise matches plus close or “fuzzy” matches.

Detailed Plagiarism Score: Quetext’s thorough plagiarism score is supported by billions of online sources.

Snippets of Interactive Text: You could easily drill down on the matches side-by-side using Quetext’s interactive as well as user-friendly sample text viewer.

Free and Paid

The Quetext Plagiarism Checker application is free to use, however it has some limitations. Users could check a maximum of 2,500 words for free during the trial period, but post that, they must subscribe for $9.95 per month.

Pros and Cons


  • Provides a citation helper to aid with the addition of missing citations.
  • There are numerous assistance alternatives, but no live support.
  • Detects the majority of plagiarism


  • Partial matches occur when one source text is matched against many sources.
  • There are plenty of false notions
  • It is ineffective for scholarly sources.

2. Copyscape

The user interface of Copyscape is simple and intuitive. You won’t have to look far since their website doesn’t provide much information. All you have to do is enter the link to your document file as well as check for plagiarized content, as well as the sites wherein the information is plagiarized if there are any.


Copying and pasting: You can study offline information by copying and pasting the text.

Check the entire website: With premium services, a maximum of 10,000 pages could be checked in a single step with Batch Search.

Uploading files: You could read the information in a Word or PDF document by uploading the document.

Managing cases of plagiarism: Keep track of multiple instances of plagiarism plus your reactions to them (online content only).

The API is used to automatically check the content: Scripts can do automated Copyscape searches using the Premium API.

Remove results from particular sites: You could exclude results from websites that you control or are already familiar with.

Check for plagiarism in your content: Make a private offline content index and check to see if your material is unique.

Free and Paid

Copyscape is a service that is available for free. You could use its free services, but if you want higher quality, you must upgrade to its premium services. Copyscape charges 3 cents for every search (as much as 200 words) + 1 cent for additional 100 words searched for plagiarized content.

Pros and Cons


  • Simple use
  • Searches the web for plagiarized material 
  • The most effective software solution


  • Expensive
  • There is no verification.
  • There is no explanation for the sources examined.

3. Grammarly 

When detecting plagiarism, Grammarly proposes more than you want. You may also use Grammarly to check the writings/content for grammatical errors. Upload your content and obtain the percentage of plagiarized content results.


Writing Enhancements: The plagiarism checker is a function of a comprehensive writing tool which provides detailed comments on advanced stylistic concerns such as word choice, tone, conciseness, and more, as well as writing mechanics such as spelling and grammar.

Plagiarism Checking: The Grammarly Plagiarism Checker tool could detect plagiarized material within ProQuest academic databases in addition to billions of web pages. It requests citations and gives you the necessary resources.

Free and Paid

You may use Grammarly for free! You can use its services for free, however, free services always seem to have restrictions. Both the monthly ($30 each month) as well as yearly ($12 each month) plans have a character restriction of 100,000.

Pros and Cons


  • Provides a citation plus language assistant but doesn’t sell or share papers with third parties
  • Frequently discovers the original plagiarized source


  • Doesn’t work well with altered content.
  • The same colors are used for various sources, as well as the formatting has been temporarily eliminated.
  • 100,000-character limit (14,000–25,000 words)

4. DupliChecker

DupliChecker offers simple services and permits you to try them out for free! To check for plagiarism, you could copy-paste the text, in addition, to include the URL to your doc file as needed.


Different File Types: You could also upload text using several means, such as copying a basic text block, using a device, or using cloud storage; 7 document formats are available. Document formats such as.tex,.doc,.txt,.docx, pdf,.odt, as well as.rtf are not restricted.

Privacy is assured: This is a plagiarism analyzer that guarantees complete privacy. It discards the material after testing for plagiarism to eliminate the chance of data leaks. To put it simply, none of your stuff is saved or replicated on their platform.

Percentage conclusions: It provides complete comfort to users by delivering a unique content ratio depending on a percentage as well as a number. This also has the highest percentage of plagiarism detectors.

AI technology is utilized to create technological tools such as It does not only select the most appropriate information, however, this it also identifies any plagiarism.

Plagiarism detection on academic papers, websites, and so forth: Other writing enhancements include the elimination of redundant articles, the removal of plagiarism, as well as the highlighting of grammatical errors. It creates high-quality, ready-to-publish content.

Language Support: Based on its popularity among multilingual users worldwide, they offer plagiarism detection in a variety of languages. Arabic, Dutch, Indonesian, Spanish, Portuguese, Russian, and Italian is all supported.

Free and Paid

DupliChecker provides its users with free trials plus services. However, if you want to upgrade with even better features and services, they have the ability to tailor your plan based on your demands and budget. Membership is $10 per month.

Pros and Cons


  • Simple to use
  • This has a good accuracy rating
  • An easy-to-use interface


  • The website database is restricted
  • Not quite good with smaller sentences
  • There are much too many advertisements in the free edition.

5. Unicheck

Unicheck is a premium plagiarism checking tool with thousands of users who have already examined millions of files. A page of around 275 words takes roughly four seconds to check.


Data on Student Development: All Unicheck administrators have access to statistics illustrating student development with time. The numbers consider both usual similarity rates plus commonly utilized web sources.

Search Preferences Can Be Changed: Search preferences could be changed on both the instructor as well as administrator account levels.

Continuous Workflow: The workflow is easily understood by both students and teachers.

Effortless Integration: Unicheck requires simply a single integration and configuration. Then it’s ready to go. Post the setup is done, you will have immediate access to all security plus feature upgrades.

Checking Accuracy: Consider the benefits of automatic checking. Unicheck’s similarity search includes the 91B current plus archived internet pages, imported, open access, internal institutional libraries, and consortium databases.

Free and Paid

Unicheck provides both free and premium services. You could check a total of 200 words at one time for a fixed number of times using its free plagiarism checker. Following that, pricing is determined by the number of pages (e.g., $10 for 50 pages, $5 for 20 pages, and $15 for 100 pages).

Pros and Cons


  • Frequently identifies the original plagiarized source
  • Live assistance
  • Without permission, doesn’t sell or disseminate documents.


  • A hazy report makes it harder to locate the plagiarized source.
  • Multiple matches for a single plagiarized sentence.
  • The same highlight colors are used for various sources.

6. Small SEO Tools

With all of the essential information offered and discussed on their website, you will not have any trouble working with minor SEO tools. This examines the grammar as well as the plagiarism of the file users upload. This utility has multi-platform support as well as free services.


Several languages: You can utilize this feature to check for plagiarism in materials published in languages other than English. As a result, Small SEO Tools can communicate in your language, whether this is written in Dutch, Italian, Portuguese, or any other language.

Countless online pages: This tool can detect plagiarism in your work by matching it to the billions of web pages over the Internet. They instantaneously compare your content to every other piece of information available on the internet.

Document formats supported: You can upload documents within doc,.docx,.txt,.tex,.rtf, .odt, and.pdf formats.

Automatic Rewriting: With a single click, you can have it quickly rewrite whatever content you put through it. Simply click the “Rewrite” button to be taken to the auto-paraphrasing tool, wherein your work will be instantly changed if it comprises plagiarized material.

URL integration: You might check for plagiarism with this free online plagiarism-checking tool by submitting documents in different configurations and inputting a website URL. To continue, simply input the URL of the website as well as hit the “Check Plagiarism” button.

Free and Paid

Small SEO Tools offer free services for reviewing 1000-word material at a time.

Pros and Cons


An enormous number of tools are free to use.


They will not provide all of the possibilities of a few of the more specialized paid solutions offered on the market, particularly in the field of SEO.

7. Plagscan

Each year, Plagscan tests about 1 million papers. This is a sophisticated plagiarism detection program appropriate for individual users, students, and sometimes even huge corporations. Because the Plagscan could scan, compare, and upload concurrently, it saves time and produces results in seconds.

Plagscan’s key features include: 

  • This could scan numerous web pages by simply entering the URL
  • Provides API integration.
  • It offers a variety of languages.
  • It possesses plagiarism prevention tools.
  • This provides organized reports that facilitate authentic checking.
  • It maintains your data incredibly private using servers in Germany. 

Free and Paid

PlagScan plagiarism tool cost starts at about $419 and covers up to 26 pages or 6500 words. It also offers up to 2000 words of a free trial


  • Frequently detects the originating source of plagiarism (full match)
  • Doesn’t sell or distribute documents without authorization.
  • You pay for a specific number of words which you can utilize on various occasions.


  • There is no significant (live) assistance, only email.
  • The majority of the plagiarized sources could not be located.
  • The same highlight colors are used for various sources, and each source is opened in a new tab.


A plagiarism-detecting tool crawls and indexes web content, analyzing your work for matches against a database of current internet content. A keyword analysis is used to identify exact matches. This is how it detects and identifies plagiarism and copied information.

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