How can I check if a PDF document was written using AI?

One of the easiest methods to check if a PDF document was written by AI is to copy the text from the PDF and analyze it with an AI detection tool.

Quillbot’s AI Detector can help identify patterns commonly associated with AI-generated writing, providing additional insights as well as manual review.

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Is ChatGPT safe to use for school?: ChatGPT is safe to use for school when students follow these precautions:

Stay informed about potential risks such as ChatGPT plagiarism.

Review and follow your instructor and/or school’s policies about generative AI (e.g., Some schools require students to disclose when they’ve used ChatGPT for assignment help).

Avoid sensitive personal information in prompts (e.g., your name and contact information).

Verify facts provided by ChatGPT with credible sources.

Use ChatGPT for small pieces of an essay (e.g., a hook or thesis statement) or to brainstorm ideas. Don’t prompt ChatGPT to generate entire drafts.

Revise any content that ChatGPT generates to ensure the writing assignments you submit are in your own writing voice.

Another way to use ChatGPT safely is by using Quillbot’s free AI Content Detector or AI Detector Mobile App for iOS to ensure that AI-assisted writing hasn’t been plagiarized.
When was ChatGPT released?: ChatGPT was first released on November 30, 2022.

Since then, various updated versions have been released, like ChatGPT-4 on March 14, 2023 and ChatGPT-4.5 on February 27, 2025.

OpenAI, the company that created ChatGPT, is working on new versions for future release.
Can AI write a book?: Yes, AI can write a book. However, a book written by AI probably wouldn’t be a very good book.

Unlike humans, AI is limited when it comes to creativity (e.g., with figurative language), themes, and tone of voice.

Despite this, generative AI can be helpful to human authors. For example, AI can suggest writing strategies to put writers in the right mindset. It can also be used for parts of the writing process. For example, if you’re brainstorming ideas for your own book, the Quillbot AI book title generator can instantly suggest creative, attention-grabbing titles to spark inspiration.

If you use it more extensively, generative AI can be used in combination with a tool that can humanize AI text to improve the style. However, it’s good to be aware that many publishers also use AI detectors to check that what they publish is high-quality, human-written work.

If you’d like to see how AI detectors work, you can try the Quillbot AI Detector.
Can AI-generated PDFs be edited to appear human-written?: AI-generated content can be revised, paraphrased, or combined with human input, making it more difficult to identify through manual review alone. In such cases, it’s helpful to use multiple verification methods.

For example, you can analyze the text with Quillbot’s AI Detector to assess potential AI involvement and use Quillbot’s Plagiarism Checker to identify any content that may closely match existing online sources. Together, these tools can provide a more comprehensive evaluation of a document’s authorship.
Can you use AI to rewrite text?: Using AI to rewrite text can be a quick and easy way to improve clarity, tone, or structure, depending on what you need. You can then use a humanizer tool, like Quillbot’s, to humanize AI text so it reads more like something a person would actually write.

If you’re unsure whether the final version still feels too “AI-generated,” Quillbot’s AI Detector can also help you check the text before you share it.

Paraphraser

Grammar Checker

AI Detector

Plagiarism Checker

AI Humanizer

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How can I check if a PDF document was written using AI?

Related article: How to Verify Whether a PDF Document Has Been AI-Generated

Do it all with Quillbot

AI writing tools: Other interesting questions