summary Summary

ChatPDF is an innovative tool that makes interacting with PDFs as simple as having a conversation.


By utilizing GPT 3.5, ChatPDF effectively serves as a chatbot for any PDF document, capable of answering your questions and even rewriting sections as needed. Whether you're a student, a professional, or simply someone with an insatiable thirst for knowledge, this tool can drastically enhance the way you engage with textual content.

It has a similar functionality as Deep Legal’s Wisebot but for a more commercial audience, aimed at students and productivity gurus.

Key Features and Benefits

Designed with a user-friendly interface, ChatPDF allows users to ask questions directly from documents. I fed ChatPDF an 8-page PDF review of a school taken from the International Good Schools Guide and it was able to intelligently answer questions on it, including the university destinations of graduates. Perfect for saving time rather than having to scan the document for information.


It provides immediate, contextually accurate responses. For students, this means effortless comprehension of textbooks, research papers, and academic articles. It saves precious hours and supports academic growth effectively and responsibly.

For professionals dealing with dense documents like financial reports, ChatPDF's ability to quickly dissect and analyze data is a game-changer. For curious minds, the benefits are just as significant. From deciphering historical documents in simple language to interpreting poetry and literature, ChatPDF opens a world of knowledge at your fingertips. Impressively, this bot supports any language.

Pricing and Availability

The free tier of ChatPDF offers service for up to three PDFs per day, with a limit of 120 pages and 50 questions. This means feeding it PDFs of full-length novels or wordy textbooks is off-limits and the free version is better for shorter documents.

The Plus package at $5 per month provides service for up to 50 PDFs per day, allowing for up to 2,000 pages and 1,000 questions.

Future Prospects and Limitations

Presently, ChatPDF uses the GPT 3.5 model, with a future upgrade to GPT 4 on the horizon. This hints at an even more refined and accurate experience for users. Additionally, the tool is expected to introduce a feature allowing for chats with multiple PDFs in a single session.


As it stands, the only limitation is the number of PDFs and questions one can interact with per day, depending on the chosen package.

About the Founder

ChatPDF is the brainchild of Mathis Lichtenberger, a software engineer hailing from Berlin. With a stint as the VP of Engineering at Bliq under his belt, Mathis brings to the table a wealth of experience in building user-focused tools.

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  • Chat PDF utilizes GPT 3.5 to work as a chatbot for PDFs. It answers queries and rewrites sections to simplify user interaction with documents.
  • Key features include a user-friendly interface, immediate and accurate responses, support for all languages, and confidentiality of data. 
  • The tool offers a free tier and a Plus package ($5/month) with different usage limits. Future updates include a transition to GPT-4 and a feature for multi-PDF chats.
Journalist and published fiction author Harry is leveraging AI tools to bring his stories to life in new ways. He is currently working on making the first entirely AI generated movies from his novels and has a serialised story newsletter illustrated by Midjourney.
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Join the DECODER community on Discord, Reddit or Twitter - we can't wait to meet you.