Discover our free AI detector tool – an efficient AI checker designed to identify AI-generated content and ensure the authenticity of your writing.

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.

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English

Spanish

German

French

0/

1,200 words


%
of text is likely AI-generated

AI-generated 

--%

AI-generated & AI-refined 

--%

Human-written & AI-refined 

--%

Human-written 

--%
caution icon

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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0/

1,200 words

caution icon

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.

Homework, hero image

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 generated with AI and text that’s been refined using these 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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Quilly at desk, 0% AI generated

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

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.

Analysis of a work project, 74%

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.

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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 AI-generated text. 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

AI Detector FAQs

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.

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

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

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.

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.

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