ChatPDF

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

4.1•12 reviews•

377 followers

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

4.1•12 reviews•

377 followers

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Note and writing apps

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PDF Editor

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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.

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Launch tags:Productivity•Artificial Intelligence•Chat rooms

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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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3yr ago

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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3yr ago

@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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3yr ago

ChatPDF

Maker

@joel_diigo @fedoskin yep, exactly!

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3yr ago

@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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3yr ago

ChatPDF

Maker

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

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3yr ago

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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3yr ago

ChatPDF

Maker

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

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3yr ago

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

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3yr ago

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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3yr ago

Tried it today & absolutely love it. Fantastic work @xathis ! I tried it on a research paper on cancer genomics & it was able to "chat" & give *intelligent* answers ! Mathis, is the code for chatpdf opensource ? If not, would love for you to consider making it opensource

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3yr ago

Hello Mathis bro. Actually, I have large pdf file of size 200 mb. And, Can i compress it to less than 30 mb and can i use it there? Any ways to do that much high compression?

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3yr ago

Hi Mathis, excellent work! Do you have to pay to use the ChatGPT API? As a PDF can contain substantial number of tokens...

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3yr ago

Amazing concept. I can see so many use cases for this already! Perhaps having a way to quickly convert a webpage or text to PDF would be a nice addition (although I'm sure there are many tools which can already do this). Congrats on the launch! I can add ChatPDF to https://easywithai.com if you'd like :)

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3yr ago

ChatPDF

Maker

@jason_derekis Thanks! Sure, I'd be flattered to be featured on easywithai!

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3yr ago

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4.1

Based on 12 reviews

Review ChatPDF?

Reviewers see ChatPDF as a handy way to question long PDFs, summarize dense sections, and pull specific details from research papers, contracts, and books without manual searching. They especially value its speed and the ability to get references for later fact-checking. But the feedback is mixed on reliability: some say it occasionally returns unrelated answers, fails to answer queries it handled before, and still cannot analyze multiple PDFs in one chat. One reviewer also argues the paid plan is hard to justify versus ChatGPT, though the limited free version is convenient.

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ChatPDF

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

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