Plagiarism Checker Chrome Extension

Plagiarism Checker
Chrome Extension

Check plagiarism and detect AI-generated content instantly, without leaving your Google Chrome browser.

Trusted by over 10 million students, teachers, and professionals, Quetext helps you write with confidence, maintain integrity, and publish original work every time.

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How to get started with the Quetext
Plagiarism Checker Chrome Extension

  1. 1

    Visit the Google Chrome store and download the extension.

  2. 2

    Log in to Quetext with your regular username and password (or create a new account).

  3. 3

    Highlight text on any webpage you visit using Chrome.

  4. 4

    Click the Quetext extension icon in your browser bar and Check Plagiarism.

  5. 5

    Relax while we do the heavy lifting, identifying duplicate content.

  6. 6

    Click the highlighted mistakes to fix them in an instant.

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Why Use the Quetext Plagiarism Checker Chrome Extension?

Verify Content Without Interrupting Your Workflow
Checking for plagiarism and AI has now become easier than ever. With Quetext everything happens right where you're already working, on the page.

Check Any Webpage in Seconds

Our Chrome Extension can help you in every way. Whether you're reviewing a blog post, reading a student submission, or proofreading web copy before it goes live, simply highlight the text you want to scan and click the Quetext icon. Within seconds, you'll have a detailed plagiarism report, no copy-pasting required.

Powered by DeepSearch™ Technology

Quetext's proprietary DeepSearch™ engine scans your text against billions of web pages, millions of books, and academic journals to deliver highly accurate results. It works through three advanced layers:

  • Contextual Analysis: Understands meaning, not just keywords
  • Fuzzy Matching: Detects paraphrased and reworded content
  • Conditional Scoring: Provides a nuanced originality score

This ensures both exact matches and cleverly modified content are detected.

Detect AI-Generated Content Instantly

Go beyond plagiarism detection. The extension also includes a powerful AI Detection engine.

  • Identify text generated by tools like ChatGPT, Gemini and more
  • Get a clear probability score (AI Score) for AI-written content
  • Review flagged sections alongside plagiarism results

Ideal for educators, editors, and anyone reviewing authenticity.

Understand Results Immediately with ColorGrade™ Feedback

Quetext's ColorGrade™ system makes reports easy to interpret:

Exact matches Near matches Paraphrased content AI-flagged sections

View sources side-by-side within your workflow so you can quickly identify what needs revision.

Built for Everyone Who Writes

Students can verify research sources before citing them. Teachers can spot-check suspicious passages directly on the web. Copywriters and content marketers can audit competitor pages or confirm their drafts are clean before publishing. Whatever your role, the extension makes originality verification effortless.

Check for Plagiarism & More

Fast, accurate plagiarism detection

Whether you highlight a few paragraphs or upload entire documents, you can now check for plagiarism either way using the Quetext Chrome Extension. Our best-in-class plagiarism checker quickly generates a report, identifying any instances of duplicate content, so you can fix it before you submit it.

Quetext uses DeepSearch™ Technology to run your text through three key steps:

  • Contextual Analysis
  • Fuzzy Matching
  • Conditional Scoring
check for plagiarism and more
bulk uploads multiple users

Bulk Uploads + Multiple Users

Scale your productivity with the ability to bulk upload up to 100 documents at a time (check out our different Pricing Plans to find what's best for you). Additionally, teams can now work together out of the same account with our new Additional Users feature.

Who is the Chrome Extension for?

Students

Check research sources instantly and ensure your work is original before submission. Generate citations and download reports as proof of authenticity.

Teachers and professors

Review student work, online sources, or shared documents quickly. Spot potential plagiarism and AI usage with clear visual reports.

Copywriters and content marketers

Audit web pages, verify freelance submissions, and ensure your content is client-ready before publishing.

Bloggers and SEO professionals

Avoid duplicate content issues. Check competitor pages, guest posts, and drafts without leaving your browser.

Researchers and academics

Validate sources and scan academic material instantly using DeepSearch™ cross-referencing.

How DeepSearch™ Technology works in the extension

Every scan you run through the Chrome Extension goes through the same three-step process that powers Quetext's full plagiarism checker:

  1. 1

    Contextual analysis

    DeepSearch™ looks beyond individual words. It evaluates the statistical likelihood and surrounding context of phrases, catching plagiarism even when wording has been rearranged or lightly edited.

  2. 2

    Fuzzy matching

    The algorithm identifies text that has been altered just enough to avoid detection by simpler tools - synonym swaps, sentence restructuring, and patchwork plagiarism all get flagged.

  3. 3

    Conditional scoring

    Each flagged passage is individually weighted against your overall document score. This gives you a nuanced plagiarism percentage rather than a simple pass/fail, so you know exactly how much of your text needs attention.

Together, these three steps scan your text against billions of web pages, over 20 million books, and more than 1 million academic journals - delivering results you can trust in seconds.

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Click below to find a pricing plan that fits your needs.

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Quetext Plagiarism Checker Chrome Extension FAQ

How do I check for plagiarism in Chrome?+

Checking plagiarism with the Quetext Chrome Extension is simple and flexible. Once installed and logged in, you can scan content directly from webpages or upload documents for analysis.

  • Highlight any text on a webpage
  • Click the Quetext extension icon in your browser
  • Select "Check Plagiarism" to generate a colour-coded report
  • Alternatively, click the extension icon and choose "Upload Files"
  • Upload a document from your computer and scan it instantly

Is the Quetext Chrome Extension free?+

Yes, the Quetext Chrome Extension is free to download and includes limited free usage. For more advanced needs, paid plans unlock extended capabilities.

  • Free plan allows scanning up to a limited word count per check
  • Paid plans have no upper limit. You can customize it with respect to your requirements.
  • Access premium features like:
  • Flexible pricing plans available based on usage

Do I need a Quetext account to use the extension?+

Yes, you need a Quetext account to use the Chrome Extension. This ensures your reports and scans are securely stored and accessible.

  • Log in using your existing Quetext credentials
  • New users can create a free account in seconds
  • Account access enables full feature usage and report tracking

What if I need to check more than 1000 words?+

If you regularly work with longer documents, upgrading to a paid plan is recommended. This allows you to scan large volumes of content efficiently.

  • Paid plans support up to 25,000 words per plan
  • Ideal for academic, professional, and bulk use cases
  • Includes features like bulk file uploads, source exclusion, and enhanced reporting

What file types can I upload through the extension?+

The extension supports a variety of commonly used document formats, making it easy to scan different types of content.

  • Supported formats: .doc, .docx, .pdf, .txt
  • Simply click "Upload Files" from the extension menu
  • Select your file and start scanning instantly

How accurate is the Chrome Extension compared to the full Quetext tool?+

The Chrome Extension delivers the same level of accuracy as the full Quetext platform. It uses the same advanced detection engine and database.

  • Powered by DeepSearch™ Technology
  • Includes Contextual Analysis, Fuzzy Matching, and Conditional Scoring
  • Scans billions of web pages, academic papers, and publications
  • Accuracy remains identical - the only difference is how content is input

Does the extension work on Google Docs or other online editors?+

Yes, the extension works on most webpages where text can be selected. This includes many online editors and content platforms.

  • Highlight text directly on the page
  • Click the extension icon to scan
  • Works across websites, including Google Docs (with manual selection)
  • Best results come from selecting specific sections to scan

Can I use the extension to check content in languages other than English?+

Yes, multilingual support is available, especially with paid plans.

  • Supports multiple English dialects: US, UK, Australia, Canada, New Zealand, South Africa
  • Additional supported languages: French, Spanish, German, Italian, Portuguese, Polish, Romanian, Dutch

Does Quetext store or share the text I scan?+

No, your content remains private and secure. Quetext follows strict data protection standards to ensure confidentiality.

  • No sharing with third-party organisations
  • All scans remain private
  • Strong data security practices in place
  • Users can review details in the Privacy Policy

Can I generate citations directly from the extension?+

Yes. The built-in Citation Assistant lets you create citations in MLA, APA, and Chicago formats. When a flagged passage needs attribution, you can generate and insert the citation without switching to a separate tool.

How do I install the Quetext Chrome Extension?+

  • Visit the Chrome Web Store
  • Click "Add to Chrome"
  • Confirm installation
  • Log in to your Quetext account
  • Start scanning instantly

Is the extension available for browsers other than Chrome?+

The extension is currently designed for Google Chrome. However, you can always use the full Quetext plagiarism checker on the web in any browser.