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Description from extension meta
Get Free Polygraf AI content detector with plagiarism checker to identify ChatGPT, Gemini, Mistral, Llama, Grammarly.
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Description from store
Get instant content verification with the Polygraf AI Content Detector, now with exciting new features in our year-end update! This extension will help you to identify AI-generated text in real time and humanize, summarize your text directly within the tool. Whether you’re an editor, writer, student, marketeer, or just a curious browser, Polygraf AI Content Detector Chrome extension lets you check the authenticity of your digital content everywhere you work. Upgrade to use advanced features.
We’ve introduced some major upgrades:
Fresh New Design: A sleek interface to make your workflow seamless.
Scan Anything, Anywhere: Highlight text and click our yellow Polygraf icon for instant detection—it's always right where you need it.
Text Editing Magic: Edit and scan text in one space, no more tab-hopping!
For Standard/Premium Plan Holders:
Instant Summaries: Get quick summaries for any text.
Humanizer (Beta): Transform AI-generated text into natural, human-like content, ensuring it's ready for any authenticity checks.
Polygraf remains the world’s most detailed AI Content Detector, capable of identifying content generated by ChatGPT, GPT-4, Claude, Gemini, Grammarly, and with greater than 98% accuracy. It’s the only detector that can distinguish Grammarly-enhanced text from AI-generated content, providing unmatched accuracy for professionals and students alike.
Easy Installation:
Click ‘Add to Chrome’
Pin the Polygraf AI Detector to your extension bar
Log in using Google or Sign up with your email
Highlight text and click the extension icon to start detecting with our ChatGPT and Plagiarism checker.
Key Features:
AI Checker Free Version: Enjoy robust detection capabilities at no cost with the free version of our AI detector, including features like the ChatGPT detector and Grammarly detection with monthly renewing limited tokens.
AI Detection: Add Polygraf Google Chrome extension in seconds and use Polygraf AI Detection to identify Human or AI-generated content in real-time, including a precise ChatGPT detector for pinpointing AI-created text, and a plagiarism checker for identifying unoriginal content. Polygraf accurately shows ChatGPT, Claude, Gemini, Llama, and other gen-AI
AI Source Detection: Patent-pending Polygraf AI Content Detector will tell you whether the content was artificially generated, enhanced by Grammarly, or created by specific AI models like ChatGPT, functioning as an effective plagiarism detector as well.
Writing Style Analysis: Evaluates text on 6 parameters:
Perplexity: measures text complexity. (Higher tends to be Human)
Readability: indicates sentence structure complexity.
Vocabulary richness: reflects word diversity. (Higher tends to be AI, especially if altered by Grammarly)
Syntactic tree depth: assesses text predictability. (Higher tends to be AI)
Average sentence length: shows typical word count per sentence. (Higher tends to be AI)
Average word length: represents the average length of words used. (Higher tends to be AI)
Unmatched Accuracy: Boasts over 98% accuracy with a minimal false positive rate.
Versatile LLM Detection: Recognizes content generated by top AI models, including ChatGPT 3.5, 4; Google Gemini, Meta Llama 3, Mistral AI, Grammarly, and Claude.
Detailed Reports: Generates comprehensive reports to verify the originality of your content, leveraging both ChatGPT checker and plagiarism checker functionalities.
Deception Filter (Web interface only): Detects intentional and unintentional text modifications aimed at deceiving AI models, such as empty spaces between words, deliberate grammatical errors, or alterations by Grammarly.
Copyright Detector (Web interface only): Detects the original source of the content, providing URLs and exact sentence or phrase matches from the source, acting as a powerful plagiarism detector.
How It Works:
Polygraf AI uses proprietary AI protocols extensively trained on human and AI-generated content. Our real-time AI text detector can identify nuanced patterns in text to distinguish between human and AI authorship, even for Grammarly-enhanced text.
Real-time Detector: Verifies content origins in real-time across multiple models like ChatGPT, Google Gemini, Meta Llama 3, Mistral AI, Grammarly, and Claude.
Probability Assessment: Provides insights into the origin, trustworthiness, and whether content was human-written or AI-enhanced.
Forensic Linguistic Analysis: Traces machine-generated text back to its original source material.
Intuitive Interface: Features easy-to-use dashboards, direct source links, and clear similarity percentages.
Premium Features:
Unlock the full potential of Polygraf with a premium subscription:
AI Source Detector: Identify which AI tool (e.g., ChatGPT) created the content.
Copyright Detector: Protect your work by identifying the original copyright holder.
AI Highlighter: See exactly which parts of your content are AI-generated.
Advanced Plagiarism Detector: Check for deeper plagiarism issues (web only).
Website AI Analysis: Instantly verify AI usage on websites.
Why Choose Polygraf?
The Best Detection Accuracy: Our AI Detector boasts an impressive >98% accuracy rate in internal tests, setting a benchmark in the industry. Polygraf is trusted by government agencies and businesses worldwide for its ChatGPT detector and plagiarism detector capabilities.
Unique Features: Did you know that Polygraf is the only AI detector that can tell if the content was enhanced by Grammarly or created by generative AI models like ChatGPT? This can be critical, protecting you against misinformation, propaganda, and claims of academic misconduct & copyright infringement with our advanced plagiarism checker.
Trust & Data Security: We don’t train our models on your data. This means we never store your information, making Polygraf a trusted, 100% secure AI Detector. Our ChatGPT detector, Grammarly detection, and plagiarism checker functionalities ensure your content remains original and credible.
By integrating a powerful ChatGPT detector, plagiarism detector, and Grammarly detection, Polygraf stands out as a comprehensive tool for anyone serious about maintaining the authenticity of their digital content.
Latest reviews
- (2025-06-13) Paul: Polygraf AI has officially become an essential part of the content writing workflow. Its ability to accurately detect whether content is written by humans or AI is impressive. Other useful features include the copyright detector, writing analysis, cognitive flow index, and the AI humanizer. I recommend Polygraf AI to marketers, writers, and academic professionals alike!
- (2025-06-07) Wesley Brown: This is so cool! It helps me write and rewrite everything that is AI generated and also helps me to see on LinkedIn or other sources who is using AI generated content for their posts. So many other tools available and I think its worth checking out
- (2025-02-28) Mohammad Yasser Khattak: Not found as was expected
- (2024-08-22) Mehri Gulamova: Honestly, I was skeptical at first, but Polygraf has exceeded my expectations. It’s simple, reliable, and gives me peace of mind knowing my work is truly mine.
- (2024-08-22) Vilo Muslumzade: Polygraf is exactly what I was looking for. It helps me ensure that my essays are 100% authentic, and the real-time analysis is incredibly convenient. Highly recommend!
- (2024-08-22) Sarvan Bunyatov: This extension is a must-have for anyone serious about keeping their writing clean. I love how it integrates seamlessly into my workflow—no more stress about accidental plagiarism!
- (2024-08-22) Soltan Ibrahimov: Polygraf has been a game-changer for me! As a student, I need to make sure my work is original, and this tool gives me the confidence I need. Super easy to use, and the accuracy is spot on!
- (2024-08-22) Sarvar Jafarov: As someone who writes a lot of reports, Polygraf has become an essential tool. It’s so easy to check if my content is AI-free, and it helps me feel confident in my work.
- (2024-07-31) TW Leadership: Slick tool
- (2024-07-30) Narmin Ismayilova: I have been using this extension for over a month now and compared to other tools, I would say it is more accurate and gives you more in-depth details. E.g: it tells you what part of the text was humanized or if the content was deliberately altered to give it a human vibe with deception filter feature. Overall, I like how accurately it works and detects "on-the-go" while you surf on the web without the hustle of copying and pasting the text somewhere else.
- (2024-07-23) Quantascopic: Wants Login Data with Account. Email fishing... So it doesnt work for me..... simple and easy.
- (2024-06-06) Anton Stepaniuk: No need for copy pasting content! Love it!
- (2024-05-16) Michael G: Awesome app! Works amazing!
- (2024-05-16) Hozozo Hozo: The text in the login window of the extension is very hard to read + Google Log in doesn't work.
- (2024-05-15) Jacob Silent Notary: It works good, I just downloaded it, first try it works well. I'll do another review in a month. I would like to see how I can analyze documents too. Hope it is coming soon
- (2024-05-10) Ferid Nesibzade: Great job, makes my job so much easier. I recommend!
- (2024-05-10) Sahib Fermanli: Since AI was developed, it was difficult to understand whether the comments on the internet were written by AI or humans. Thanks to this plugin, our problems were solved. Thank you!
- (2024-05-10) Tural Allahverdiyev: It's great. It's a great tool for learning the source of content.
- (2024-05-10) Jamal Huseynov: Cool extension with great content! It seamlessly verifies the authenticity of online content, making it a must-have for anyone concerned about trust and reliability online. Highly recommended!
- (2024-05-09) Ulvi Amiraslanov: Very simple and comfortable to use, it's very helpful. Thank you, I recommend it
- (2024-05-06) Walter Spencer: This is pretty cool. I didn't know that I can actually see what created the the text I was analyzing. The extra token feature unlocks that, it is awesome.