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Plagiarism Checker

Check-Plagiarism offers a reliable plagiarism checker that is widely used to detect plagiarism. Our plagiarism detector offers deep plagiarism detection for writers as well as students in schools, colleges and universities. To use this tool, enter your content below and click on the button.  

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Features of Check-Plagiarism

Our tool helps to check plagiarism in your essays, assignments, and blogs. There are many helpful features we have developed in our tool. Here are some of the main ones:

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

100% Safe & Secure

All files and documents checked with our free plagiarism checker 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 tool. You can also compare documents for plagiarism between them.

Easy-to-Use UI

Our 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.   

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.  

Why Check-Plagiairsm?

ribbon  Safety Assured Safe Plagiarism Checking.
💯  Quality Guaranteed Plagiarism Detection with 99% Accuracy
✅  1 000 001+ Checks Deep Analysis against Whole Internet
🈐    Multi-Lingual Supports 13+ Languages
📃  Extensive reporting Percentage based Reporting with Real Source Indication
⌛  Real-time Comparison Check for plagiarism in Real-time


Online Plagiarism Checker 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.

  1. 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.

  2. Teachers use our plagiarism checker tool 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 tool 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.

  3. Writers use this plagiarism detector:

    1. To ensure originality: Plagiarism checker helps writers to ensure that their work is original and not copied from other sources.

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

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

  4. Webmasters use this tool to make sure their content is plagiarism-free because

    1. Plagiarized content can damage the reputation and credibility of a website.

    2. It's also important because Google has clear policies on plagiarized content and penalizes websites that contain copied content.

    3. It can lead to legal problems, If the original content is protected by copyright. 

  5. Educational institutes (colleges and universities) can integrate our tool using Plagiarism APIs.

  6. Law firms use this tool to protect the documents of their clients. 

Check more details about how to avoid plagiarism

plagiarism checker plagiarism checker

How to use this Plagiarism Checker free?

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

  1. Type or paste your text into the input box.

  2. 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). We do not share any of our user's data, all uploaded files are highly secured and inaccessible.

  3. 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.

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

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

how to use 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. While if you copy and paste but cite the source with proper formatting then it's not plagiarism.

legal  Is the usage of plagiarism-checking tools Illegal?


Educational institutions highly recommend plagiarism-checking tools 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 its 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


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 plugin and start using it. Check Plagiarism also support 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 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.