How does ChatPDF apps work?

It involves two steps: document ingestion and similarity search. During ingestion, relevant documents are provided to the model as training data. In similarity search, the model compares the user's query with the learned representation of the documents to retrieve relevant information. This enables the model to generate more informed responses by incorporating external knowledge.

Can I use ChatPDF with a multiple PDFs?

With PDF Pals, yes. Simply select your PDFs and then choose to open with PDF Pals. Read more: https://pdfpals.com/changelogs/v1.1#chat-with-multiple-pdfs

Can I use ChatPDF with scanned PDFs?

Yes, PDF Pals employs Optical Character Recognition (OCR) technology to enhance its understanding and processing of scanned PDF documents.

Can I communicate in a different language other than English?

Absolutely. You are free to switch the output language at any point during the conversation. As a default setting, PDF Pal will always respond in the same language as your questions.

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What is PDF Pals?

Gain insights from your documents. Instantly.

PDF Pals is a native AI PDF assistant for Mac. Open one or multiple PDFs, ask questions in plain language, and get answers with references to the relevant source pages. Your documents stay on your Mac, with no file upload or cloud vector database required.

Native, Fast & Powerful: Not another 500MB Electron app. No file size limit!
Flexible.: Use local models, or your own API key for OpenAI, Anthropic, Google, OpenRouter and more. Ollama and LM Studio work too.
Smart.: PDF Pals supports scanned PDFs and complex forms using a powerful OCR engine.
Secure.: Your documents stay on your Mac. We never upload your files. PDF Pals stores your API keys securely in the Apple Keychain.
Respect Your Privacy.: Your library is stored locally and never used to train AI. Crash reports and analytics are optional.
Easy to backup.: All your data is in a local SQLite database.

“ PDF Pals is a great way to interact with multiple PDFs simultaneously on your local device. It's super-helpful when you need the ability to summarize information from multiple documents about a single topic. The ability to customize the AI model settings and the system prompt is also very useful.”

Jasonn Smith

amotivv

For Software Developer

Learn Faster from Technical PDFs

PDF Pals is an AI reading assistant for developers working through technical documentation, specifications, and e-books. Ask focused questions and jump directly to the PDF pages behind each answer.

For Legal Professional

Simplify Legal Document Review and Analysis

PDF Pals is an AI document assistant for legal professionals who review contracts, case files, and long legal PDFs. Ask questions, extract key details, and follow each answer back to its source.

For Researchers and Academics

Improve your research and academic processes

PDF Pals is an AI research assistant for Mac that helps researchers summarize papers, extract key arguments, compare findings across multiple PDFs, and verify answers against the cited source pages.

For Financial Analysts

Find Financial Details in Minutes

Ask questions about annual reports, statements and Excel workbooks, pull out the figures you need, and check each one on the page it came from.

Shown: PDF Pals Classic

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People l💙ve PDF Pals

Wayne W Marsh

Learning Machine

I've tried a few different PDF chat apps because it's such an effective way to interact with Docs. This one is now my go-to because it has features that you can't find elsewhere so it really is a cut above the rest. Add to that I like developers that are willing to interact with their users and actively look to improve the overall experience. As an early adopter it's been a pleasure to see it take form into a must have app...

legendary 🙄🤔🤯

@1LegendaryMan

@daniel_nguyenx This app keeps getting better. I use it daily! Keep up the good work

Nat Miletic

@natmiletic

@daniel_nguyenx Amazing 🙌

Jack Culpan

@JackCulpan

@daniel_nguyenx this is amazing Daniel, love it!

Joshua Berrios 🇵🇷 👨‍💻

@IxoyeDesign

@daniel_nguyenx This looks awesome. Love how you kept the Messages (aka iMessage) look and feel within the chat area.

Jason

Founder

PDF Pals is a great way to interact with multiple PDFs simultaneously on your local device. It's super-helpful when you need the ability to summarize information from multiple documents about a single topic. The ability to customize the AI model settings and the system prompt is also very useful.

marble

@itsmrble

I'm thoroughly enjoying PDFPals based on my tests today. It's functioning flawlessly!

Abdel Elrafa

@AbdelElrafa

@daniel_nguyenx Great job Daniel! 👏 This is great for reviewing contracts from clients locally.

Farid Bouchdak 🤲🏼✨

@bouchdak

@daniel_nguyenx Count me in on this one!

Minh-Phuc Tran

@phuctm97

@daniel_nguyenx Damn, this makes perfect sense. I’m already used to download & open pdfs using a Mac app anyway. This can just replace my default pdf app with AI chat features 🤯

emil

Programmer & Indie Hacker

I’ve been using Daniels products for the longest time now. KTool impressed me as the best solution for sedning articles to Kindle, BoltAI is (in my oppinion) the best AI integration for Mac, and PDFPals is no different. With it’s slick UI, local indexing, multi-PDF support and amazing speed, it is truly the best way to chat with and analyze a PDF, all without a single subscription! Highly recommend.