ChatPDF

Chat with any PDF - Your PDF AI to ask your PDF anything

337 followers

Note and writing apps•PDF Editor•AI Chatbots

ChatPDF is the fast and easy way to chat with any PDF, free and without sign-in. Talk to books, research papers, manuals, essays, legal contracts, whatever you have! Millions of students, researchers and professionals use this AI tool to instantly answer questions from any PDF file.

Free

Launch tags:

Productivity•Artificial Intelligence•Chat rooms

Launch Team

Mathis Lichtenberger

ChatPDF

Maker

📌

Hey Product Hunt 👋 Yesterday OpenAI released the new ChatGPT API, which is better than the best previous OpenAI models and 90% cheaper to use! I had fun integrating it to chat with any PDF - free and without sign-in! Let me know what you think 😊

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2yr ago

Mathis Lichtenberger

ChatPDF

Maker

@joel_diigo Thanks! Sure I can share! When uploading the PDF, ChatPDF is using the embedding API from OpenAI to create a semantic index of the different paragraphs of the PDF file. Later when asking a question, the question is also embedded into the same vector space using the embedding endpoint again. This allows us to find the paragraphs that are related to the question from the PDF using a vector similarity metric. A few of these paragraphs are then put into the context of the text-generation API (The ChatGPT API in this case), in addition to a prompt that tells it to synthesize an answer out of these paragraphs. The project you linked is not related, thanks for sharing! There are quite a few projects similar to this. What sets ChatPDF apart is the speed and ease of use :)

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2yr ago

Artem Fedoskin

@joel_diigo @xathis that is a really interesting approach! Am I right that upon uploading you parse the file and then you get the most similar paragraphs for each question and then feed this context to ChatGPT API for completion?

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2yr ago

Mathis Lichtenberger

ChatPDF

Maker

@joel_diigo @fedoskin yep, exactly!

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2yr ago

wonchul cho

@xathis How did you create the initial summary and proposed questions? I'm not sure which paragraphs were used as prompts to generate them. Anyway, the implementation is impressive and the output is really excellent. You are the best!

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2yr ago

Mathis Lichtenberger

ChatPDF

Maker

@neofrigate Thanks! For the initial greeting message, it's just using the first few paragraphs of the PDF

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2yr ago

Nikolay Karelin

Briefly

Nice app! Happy to upvote! Do you plan to make some blog posts on the details: PDF pre-processing, limitations and the like?

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2yr ago

Mathis Lichtenberger

ChatPDF

Maker

@nikolay_karelin Thanks Nikolay! I'll let you know when I decide to write about it :)

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2yr ago

Artem Fedoskin

This is a really cool concept! Could you tell me please – how many prompts you use to analyze the pdf?

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2yr ago

Mathis Lichtenberger

ChatPDF

Maker

@fedoskin Thanks Artem! To "analyze" the PDF, different chunks are embedded using the embedding API, not a typical text completion prompt. I described more over here: https://www.producthunt.com/post...

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2yr ago

ChatPDF

Chat with any PDF - Your PDF AI to ask your PDF anything

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