alert-img Close

Plagiarism Checker

Check-Plagiarism offers a reliable plagiarism checker that is widely used to detect plagiarism.  

upload image

Upload File

OR Type/Paste your text here
Go Pro Weekly! Exclude URL
Get rid of recaptcha Go Pro!
Check Plagiarism Check Grammar

How to use Plagiarism Checker free?

To check plagiarism of your content by using our plagiarism detector online, follow the below instructions:

  • Type or paste your text into the input box.

  • Or, upload documents by clicking the upload icon (upload). You can upload a file of 1000 words (you can increase the limit to 20,000 words per search by getting pro membership).

  • Exclude the URL (if any) from the “Show Advanced” option. This URL will be ignored while checking for plagiarism; any text copied from the excluded URL will be marked as unique content.

  • Click on the Check Plagiarism button. We have added recaptcha security to avoid robots.

All done? No extra steps are needed. Our similarity checker will scan the given content against millions of online resources and generate an accurate plagiarism report with percentages. With Deep-Search technology, free plagiarism checker can also detect instances of plagiarism accurately.

Why AI Plagiarism Checker Over Traditional One?


The AI plagiarism checker utilizes advanced technologies to ensure the accurate detection of plagiarism from any kind of text. The traditional plagiarism detectors are only able to locate the phrases and sentences that have been copied word-to-word. On the other hand, the AI plagiarism checker has been designed to check plagiarism from content that has been tweaked using synonyms. In addition, the free plagiarism checker also possesses the ability to hunt instances of accidental plagiarism, as they are equally destructive to your credibility.

ribbon  Safety Assured Safe Plagiarism Checking.
💯  Quality Guaranteed Plagiarism Detection with 99% Accuracy
🈐    Multi-Lingual Supports 13+ Languages
📃  Extensive reporting Plagiarism Checker with percentage
⌛  Real-time Comparison Check for plagiarism in Real-time


Features Offered By Plagiarism Detector

Check-Plagiarism offers a wide range of features to make the plagiarism detection process super-easy for its users. Some of its prominent features include the following:

Exclusive Database Access

The free online plagiarism checker by check-plagiarism provides you with access to an exclusive database that can detect plagiarism efficiently. It cross-checks your document against the data contained on billions of web pages which ensures 100% accurate analysis and detection of plagiarism.

Fast & Accurate

Our plagiarism checker scans your text against billions of web pages & online resources. You can check up to 1,000 words at once. (For premium users, the word limit is increased to 20,000). Upgrade to pro in just $7    

Content Duplication Highlight

To make it convenient for you to evaluate plagiarism in your work, this duplication checker highlights them in red. You can easily evaluate duplicate text due to this feature and get rid of it without facing any hassle.

100% Safe & Secure

All files and documents checked with our free plagiarism checker online are 100% safe & secure. Your data is completely secure on our servers. No user/search engine/crawler can access your data in any capacity.    

Multiple files support

You can check copied content in up to five documents at once (supported formats: doc, docx, txt, and pdf). Scanning multiple papers will not decrease the speed of the similarity checker. You can also compare documents for plagiarism between them.

Easy to Use UI

Our online plagiarism checker has a very easy-to-use interface. It provides a simple process to check for content similarities. You can generate a detailed report with percentages.    

Exclude or Include any URL for Duplication

If you want to check plagiarism in your published content, you can simply copy the URL of the web page and conduct a duplication test. Moreover, this originality checker also provides you with the option to exclude any URL for duplication analysis, which will help you omit a specific source from this entire process.

Content Comparison

The AI plagiarism checker offers an advanced feature that compares files to find plagiarism in their content. If you are having doubts about the assignments submitted by learners, you can upload their documents to this tool and figure out if they have replicated content from one another.

Enhanced Reporting with the percentage

Our plagiarism detector scans your text with online resources and provides a complete report with percentages. It helps you to check which sentences of your content are unique and which are plagiarized.  

Sentence based checking

Our tool scans every single sentence and compares it with all online resources to detect plagiarism. It uses advanced AI algorithms to detect paraphrased plagiarism.

Reports Sharing

This plagiarism checker online offers you detailed plagiarism reports that can be easily shared wherever you want. It gives you the report in PDF format that you can share through email, WhatsApp, or any other supportive medium.

Free Plagiarism Checker Online Users

Our online plagiarism checker is widely used and loved by thousands of students, teachers, and content writers. We provide super-fast plagiarism detection solutions for colleges, universities, and all other educational institutes.


Students use it to check their papers, assignments and thesis for plagiarism. It is important for students to check their papers for plagiarism because plagiarism is considered a form of academic dishonesty. This means that if a student submits a paper that includes plagiarized material, they could face serious consequences, such as failing the assignment or the entire course or even being expelled from school.


Teachers use our free plagiarism checker to ensure that their students are submitting original work. Our tool can help teachers quickly identify plagiarism in student work so they can take appropriate action.

By using our plagiarism detector, teachers can

  1. Ensure academic integrity: By checking for plagiarism, teachers can ensure that their students are submitting original work and not cheating.

  2. Promote original thinking: teachers can encourage their students to think critically and independently to develop their own ideas.

  3. Prevent grade inflation: If plagiarized work is undetected, it can lead to grade inflation that can damage the integrity of the institution. It is also important to maintain the reputation of the institution.

    Check-Plagiarism also provides matched sources, so it helps to cite sources in your document. Use our citation generator to create APA, MLA, and Chicago formats.


W​riters use this plagiarism detector:

To ensure originality:

Our originality checker helps writers to ensure that their work is original and not copied from other sources.

To identify and correct mistakes:

Writers can identify and correct any unintentional mistakes, such as failing to properly cite a source.

To improve credibility:

Authors can establish their credibility as trustworthy sources of information by making sure their work is original and properly cited.


Webmasters use this originality checker to make sure their content is plagiarism-free because

  • Plagiarized content can damage the reputation and credibility of a website.
  • It's also important because Google has clear policies on plagiarized content and penalizes websites that contain copied content.
  • It can lead to legal problems If the original content is protected by copyright.

Educational institutes

Colleges and universities can integrate our tool using Plagiarism APIs.

Law firms

Law firms can use this tool to protect their clients' documents.

Check more details about how to avoid plagiarism.

plagiarism checker

Frequently Asked Questions?

bulb  What is considered plagiarism?


"According to Oxford: “Plagiarism is presenting someone else’s work or ideas as your own, with or without their consent, by incorporating it into your work without full acknowledgment.”

It involves:

1. Copying and pasting someone else's text

2. Paraphrasing someone else's work without proper attribution

3. Using someone else's ideas without giving them credit

4. Using someone else's images, videos, or other media without permission

5. Submitting someone else's work, such as a paper or project, as your own

copypaste  Is it plagiarism if you copy and paste but cite the source?


Presenting someone’s idea as your own is considered plagiarism if not properly cited. If you copy and paste but cite the source with proper formatting, then it's not plagiarism.

legal  Is the usage of plagiarism detector Illegal?


Educational institutions highly recommend plagiarism detector to prevent copying of others’ work. Even research work is not considered authoritative without a plagiarism report. So, using plagiarism-checking tools is legal and necessary.

consequences  What are the consequences of plagiarism?


Plagiarism involves serious consequences as it is a crime.

Its Academic consequences range to:

  • Failing the assignment
  • Failing the course
  • Institute Suspension
  • Expulsion from institution

Its Legal consequences cost you:

  • Fines
  • Intellectual Damages
  • Criminal Charges
  • Loss of your employment

Its Personal consequences can affect you with:

  • Loss of credibility
  • Damage of Reputation
  • Damage to professional relationships
  • Slowing down your career, especially in Education

legal  What Platforms Does the Plagiarism Checker Online Support?


The plagiarism checker is supported by all kinds of platforms, including desktops, laptops, and mobile devices. Since it’s a web-based utility, you can access and use it from any device’s browser by just connecting to a stable internet connection.

legal  Is there a Word Limit for Checking Plagiarism?


Yes! There is a limit of 1000 words for checking plagiarism. However, if your document contains more words, then you can divide it into parts and conduct multiple checks, as there is no limit to the number of times you can check for plagiarism with this online tool.

legal  Does The Online Plagiarism Checker Support Multiple Languages?


Yes! The plagiarism checker supports multiple languages, including English, Indonesian, French, Dutch, Russian, German, and Swedish.

legal  How Secure is the Plagiarism Detector in Terms of Data Privacy?


The plagiarism detector is 100% safe and secure in terms of data privacy. The advanced encryption technology employed in the development of this originality checker ensures that users’ data is handled with the utmost confidentiality. As soon as the text is processed and results are delivered, it automatically gets removed from the databases of this tool.

legal  Can the Plagiarism Checker Detect Paraphrased Content?


Yes! This advanced AI plagiarism checker is smart enough to detect content that has been paraphrased from another source. Its AI-based technology allows it to detect patterns and language similarities to figure out whether a piece of text is 100% unique or rephrased from existing content.

legal  Can the Plagiarism Checker Detect Similarities in Multiple Documents?


Yes! The plagiarism checker is capable of detecting similarities in multiple documents. You can simply upload the documents you wish to compare and let this tool compare and let you know how much of the content is similar in them.


We Cover Multiple Platforms

Our plagiarism-checking process supports one of the most popular platforms, WordPress. You can check for plagiarism/duplication of your content directly from your WordPress admin panel. Just download our plagiarism checker free plugin and start using it. Check Plagiarism also supports educational institutions through our APIs. Universities, colleges, and other educational institutes & Organisations can integrate our APIs to detect plagiarized content on their own end. Our plagiarism tool works accurately on other platforms as well.    

Wordpress plugin

A WordPress plugin is available to check plagiarism directly from the admin panel.

Wordpress Plugin
Plagiarism APIs

Configure your plagiarism software with our APIs, to check directly from your server.

Plagiarism APIs

How it Works

Content is first parsed into sentences, and then every sentence is checked for plagiarism. If any duplication is found against that sentence, it will be marked in red and if that text is unique, it will be shown in green.

Comparing your content

All results are displayed in real time. You can compare your content with any of the matched URLs with just one click. You can also use this plagiarism tool directly on the plagiarism comparison tool page.    

Happy Customers

Our free plagiarism checker is loved by 400,000+ customers worldwide. We have positive feedback from customers of all categories. Look at those reviews below.

Our Customers Feedback

We have 70,000+ happy clients including Masters, Students, Teachers and publishers around the world. A Positive previous record is enough for new users to understand that we have the most accurate plagiarism detector.

Nadia Moeen

This free online plagiarism detector is amazing; it checked my content in seconds with very accurate results. According to me it's the best plagiarism detection software.


I am a student and I use this tool regularly to check plagiarism for my papers. Best plagiarism checker for students.

Moosa Ali

I used their APIs to configure my college website so that students can check plagiarism free for their papers directly from the college website.