5 Best Plagiarism Checker Chrome Extension in 2025

Looking for the best free Plagiarism Checker Chrome Extensions in 2025?

If yes, you’re not alone. Plagiarism can be a real headache, whether you’re a student working on assignments, a teacher checking papers, or a content writer creating articles.

Chrome extensions make checking for plagiarism so much easier. You can check the originality of your work directly in your browser without needing extra software.

As you know, avoiding plagiarism isn’t just about staying ethical, it’s also important for building credibility, whether you’re in school or working professionally.

In this blog, I’m going to share my personal experience with five Chrome extensions that I’ve tested myself.

Key Features to Look for in a Plagiarism Checker Chrome Extension

When choosing the right plagiarism checker extension for your Chrome browser, there are a few features you should focus on to make your experience smooth and effective. Let me break it down for you:

  • Real-Time Checking: You don’t want to copy-paste text into a separate tool every time, right? Look for an extension that checks for plagiarism instantly as you type or paste your content.
  • Integration with Other Tools: Some extensions work seamlessly with platforms like Google Docs, Word, or even learning management systems like Google Classroom.
  • Offline Functionality: Sometimes, you might need to check your work even without an internet connection. A tool with offline support can be super handy for such situations.
  • Database Size: The larger the database the extension uses, the more accurate its results. It’s better if the tool can compare your content against billions of web pages, academic articles, and publications.
  • Language Support: If you write in languages other than English, this is something you can’t ignore. Some extensions offer support for multiple languages, so you can check your work regardless of the language you’re writing in.
  • User-Friendly Interface: You don’t want to spend too much time figuring out how the extension works, right? Go for a tool that’s easy to navigate and doesn’t require a learning curve.

Plagly

Plagly

Plagly helps you check for plagiarism and fix grammar issues directly in your browser. It’s a useful tool for students, teachers, and writers who want to make sure their content is original and well-written.

Features of Plagly:

  • Instant Plagiarism Checking: Plagly compares your text against a vast database, highlighting any sections that match existing online content.
  • Free Grammar Checker: Beyond plagiarism detection, Plagly identifies grammar mistakes, helping you improve the clarity and correctness of your writing.
  • Duplicate Content Checker: For those concerned about SEO, Plagly scans your website content to prevent duplicate content issues, which can affect search engine rankings.
  • Natural Language Processing: Plagly uses advanced algorithms to assess the originality of your content, providing easy-to-understand reports and analysis.

Pricing: Plagly is free to use, as mentioned on its official website. If you’re looking for a no-cost tool for checking plagiarism, this is a good option to start with.

Google Classroom

Google Classroom

The Google Classroom Plagiarism and AI Checker is a Chrome extension that integrates seamlessly with Google Classroom, providing an efficient way to ensure the originality of student submissions. This tool is particularly beneficial for educators and students aiming to uphold academic integrity within the Google Classroom environment.

Features of Google Classroom Plagiarism and AI Checker:

  • Seamless Integration: The extension works directly within Google Classroom, allowing you to check assignments without switching platforms.
  • AI Content Detection: It identifies AI-generated content, ensuring the authenticity of student work.
  • Detailed Similarity Reports: After scanning, it provides comprehensive reports highlighting potential plagiarism, complete with links to original sources.
  • User-Friendly Interface: The extension offers an intuitive interface, making it easy for both teachers and students to navigate and utilize its features.

Pricing

The Google Classroom Plagiarism and AI Checker offers various pricing plans to accommodate different needs:

  • Basic Plan: $5.99 for 20 pages, suitable for light usage.
  • Light Plan: $9.99 for 50 pages, ideal for moderate usage.
  • Standard Plan: $25.49 for 150 pages, designed for more extensive use.
  • Premium Plan: $45.49 for 300 pages, best for heavy usage.

Quetext Plagiarism Checker

Quetext Plagiarism Checker

Quetext is a plagiarism detection tool that helps you ensure your writing is original and properly cited. It’s particularly useful for students, teachers, and content creators who want to maintain the integrity of their work.

Features of Quetext:

  • DeepSearch™ Technology: Quetext uses advanced algorithms to compare your text against billions of documents, identifying both exact and near-exact matches.
  • ColorGrade™ Feedback: This feature highlights similarities in your text with different colors, making it easy to spot potential issues.
  • Citation Assistant and Generator: Quetext helps you create accurate citations in various styles, ensuring you give proper credit to original sources.
  • Interactive Snippet Text: View your text alongside matched sources for a side-by-side comparison, aiding in better understanding and correction.
  • Bulk File Upload: For paid plans, you can upload multiple documents simultaneously, streamlining the review process.

Pricing:

Quetext offers several subscription options:

  • Free Plan: Includes plagiarism checks for up to 500 words (1 page), ColorGrade™ feedback, contextual analysis, fuzzy matching, and conditional scoring.
  • Essential Plan: Starting at $8.80 per user per montdes 100,000 words per month, DeepSearch™ Extended, Citation Assistant, downloadable originality reports, custom URL exclusion, interactive snippet text, and premium support.
  • Professional and Enterprise Plans: These plans offeres and user allowances, with pricing starting at $8.80 per user per month for Professional and $7.50 per user per month for Enterprise.

Polygraf

Polygraf

Polygraf AI Content Detector is a Chrome extension that helps you identify AI-generated text and check for plagiarism directly within your browser. It’s particularly useful for educators, students, content creators, and professionals who want to ensure the authenticity of their content.

Features of Polygraf:

  • AI Content Detection: Polygraf can distinguish between human-written and AI-generated content, including text from models like ChatGPT, GPT-4, Claude, Gemini, Llama, and Grammarly-enhanced content.
  • Real-Time Analysis: It provides instant analysis as you browse, allowing you to verify content authenticity on the go.
  • Source-Specific Detection: The tool identifies the specific AI model used to generate the content, offering deeper insights into the text’s origin.
  • Humanized Text Analysis & Style Metrics: Polygraf analyzes text for humanization attempts and provides metrics like perplexity, readability, vocabulary richness, and sentence length to assess the likelihood of AI generation.
  • Detailed Content Reports: It generates comprehensive reports that are useful for maintaining academic integrity and ensuring content originality.

Pricing:

Polygraf offers a freemium model with various plans:

  • Free Plan: Includes a limited number of tokens suitable for approximately 1,000 words, allowing you to test the basic features.
  • Premium Plans: Starting at $14.95 per month, these plans offer more robust features and higher usage limits, catering to users with greater needs.

Integrito

Integrito

Integrito is a Chrome extension that helps you analyze text, check for plagiarism, and detect AI-generated content directly within your browser. It’s particularly useful for educators, students, and content creators who want to ensure the authenticity and originality of their work.

Features of Integrito:

  • Activity Reports: Track the writing process to see how a text was created, including time spent, instances of pasted text, and contributions from others. This helps identify suspicious activities like contract cheating.
  • Plagiarism Checker: Quickly scan any webpage or document for plagiarism, providing a similarity percentage and detailed reports with source links.
  • AI Content Detection: Identify AI-generated text from models like ChatGPT and Google Bard with up to 97% accuracy, ensuring the content is human-authored.
  • Integration with Learning Management Systems (LMS): Check quizzes and discussions in platforms like Canvas and Brightspace for plagiarism and AI-generated content.
  • Writing Assistant: Enhance your writing by identifying mistakes and typos, helping you produce error-free content.

Pricing: Integrito offers a freemium model, providing basic features for free with the option to upgrade for more advanced capabilities.

Why Use a Plagiarism Checker Chrome Extension?

If you’ve ever felt unsure about the originality of your work, a plagiarism checker Chrome extension can make your life so much easier.

These tools save you time by letting you check your text instantly, right within your browser. No need to copy and paste into a separate tool or switch between apps.

These extensions are especially helpful for:

  • Students and Teachers: Students can double-check their assignments to avoid unintentional plagiarism, while teachers can quickly review submissions for originality.
  • Content Writers and Bloggers: When you create online content, staying unique is crucial for SEO and audience trust.
  • Freelancers and Professionals: Whether it’s proposals, reports, or creative projects, these tools make sure your work remains authentic and professional.

Final Thoughts

Plagiarism checker Chrome extensions are a game-changer for anyone who values originality and credibility in their work. In this article, I’ve shared some of the best extensions you can use in 2025, including Plagly, Google Classroom Plagiarism Checker, Quetext, Polygraf, and Integrito. Each one has its unique strengths, making it easier for you to find the right fit based on your needs.

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