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of text is likely AI-generated

AI-generated

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AI-generated & AI-refined

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Human-written & AI-refined

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Human-written

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Caution: Our AI Detector is advanced, but no detectors are 100% reliable, no matter what their accuracy scores claim. Never use AI detection alone to make decisions that could impact a person's career or academic standing.

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A Different Kind of AI Detector

Our AI Detector is designed with writers in mind. Submit your writing to see if—and how—AI was used to create the text.

More clarity, less confusion

Paraphrasing and grammar checking tools are ethical uses of AI writing technology. They help millions of non-native English speakers and writers refine their text and express their ideas fluently.

But most AI detectors can’t tell the difference between text that’s been created with generative AI tools—such as ChatGPT, Gemini, Claude, and others—and text that’s been refined using assistive tools. This leads to false positives and cultural bias.

So we built a better AI detector.

An AI detector that’s perfect for any project

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Class assignments

Take the stress out of analyzing your students' work with our AI checker for teachers. By clearly distinguishing between AI-generated and AI-refined text, you can avoid false positives and biases against non-native English students who use writing tools ethically.

Research papers

Important papers you write for school or work should let your original writing shine. With QuillBot’s AI Detector, you can feel confident that the text you turn in meets your standards of ethical AI usage.

Work projects

The last thing you want is to turn something in to your boss that wasn’t created by you. Use our AI Detector to update your project with your original work.

Blog posts

Make sure your content reaches its audience. Algorithms will penalize your text if it contains too much AI. Originality sets you apart, grows your following, and builds trust.

A better way to detect AI

We don’t just identify text generated with AI tools such as ChatGPT, Gemini, and Claude. We also analyze text refined with paraphrasers or grammar checkers—including our own.

Here's what else sets our AI detector apart:

Free

Scan unlimited documents at no cost

Multi-use

Analyze blogs, papers & any other text

Detailed

Know exactly which text appears AI-generated

Fast

Receive your report in seconds

Do more than detect AI

We’re more than just an AI Detector. We’ve built a variety of different tools to help you with every step of the writing and editing process. Explore more of what we offer below.

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Paraphraser

QuillBot’s AI Paraphraser is fast, free, and easy to use, making it the best paraphrasing tool on the market. Simply type your text, then choose a mode (or create your own). You’ll get a brand-new way to phrase your text without losing any meaning or fluency. Customize your results with the drop-down thesaurus, or hit the “Rephrase” button to see additional options.

Plagiarism Checker

Before turning in your paper or publishing your content, be sure to check that you have given proper credit to other authors for their work. QuillBot’s Plagiarism Checker can thoroughly scan your document and highlight any unintentional plagiarism by checking billions of sources on the web, in books, or elsewhere.

Citation Generator

We know how important it is to properly cite your sources when you’re writing a research paper. When you’re ready to create your reference page, let QuillBot’s Citation Generator help you easily craft full and in-text citations in APA , MLA, or Chicago style. Our Citation Generator is the fastest and easiest way to make citations for your papers, presentations, and other projects.

Grammar Checker

When your draft is complete and you’ve ironed out all of the bumps in your content, put the final polish on your written work quickly and easily with our AI Grammar Checker. With one click, QuillBot will scan your writing and alert you to any errors in grammar, spelling, punctuation, word misuse, and more so that you can easily see what’s amiss and fix it fast.

Summarizer

When it comes to staying on top of your reading list, try our AI Summarizer. Let QuillBot’s AI sift through research papers, news articles, or long-winded emails to identify the main points and give you a high-level overview of the material. Choose from two options—Bullet Points or Paragraph Mode—to get the summary that’s best for you.

AI Detector FAQs

How accurate is QuillBot’s AI content detector tool?

QuillBot’s AI content detector tool is trained with advanced algorithms to identify repeated words, awkward phrases, and unnatural flow, which are key indicators that the content is AI-generated. However, the more advances are made in AI models, the less any AI detector tool will be able to distinguish human-written from AI-generated content.

How is QuillBot's AI Detector different from other AI detectors?

There’s two main reasons that QuillBot’s AI Detector is different from other AI detectors. First, we distinguish how AI was used to create your content. Our analysis will tell you if each section of writing was:
1) AI-generated
2) AI-generated & AI-refined
3) human-written & AI-refined
4) human-written

This way, you don’t just know if AI may have been used to generate the content. You can also understand how assistive tools may have been used in the writing process.

Second, we offer feedback on every section of your writing, so you always know exactly which sentences appear to contain AI-generated content. This makes your editing process much easier, as you can quickly identify and adjust any problematic sections of your text.

Can QuillBot’s AI Detector tool detect AI writing for teachers?

Yes, QuillBot’s AI Detector for teachers can report the likelihood that text in essays and other class assignments is AI-generated.

Can QuillBot’s AI content detector tool detect all types of AI-generated content?

QuillBot’s AI Detector can only detect text and not images, video, or other rich media content.

Can QuillBot’s AI Detector detect content quality issues beyond AI-generated content?

The AI writing detector only identifies text generated by artificial intelligence. QuillBot has a host of other tools, including a Grammar Checker, Plagiarism Checker, and Paraphraser that can all help you improve the quality of your writing.

Can the QuillBot AI content detector tool detect plagiarism?

No. The AI Detector content checker will inform you of any AI-generated content, while our Plagiarism Checker can assist with unintentional plagiarism in AI-generated content.

Can the AI content detector tool suggest improvements for my content?

No, the AI Detector will simply give you a percentage between 0% and 100% that represents the likelihood that AI-generated or AI-augmented content is in your text.

Does the QuillBot AI content detector tool support multiple languages?

The AI Detector can currently analyze text in English, Spanish, German, and French.