Undermind searches scientific literature, reads papers and figures, and builds a research library with citations.
PDF Pals
PDF Pals lets Mac users chat with PDF files through a downloadable desktop app.
About PDF Pals
PDF Pals is a native AI PDF assistant for macOS. Users open one or more PDF files, ask questions in plain language, and receive answers with references to the relevant source pages. The homepage also describes summarizing long documents and comparing findings across several PDFs.
The app uses an AI provider to generate answers. Users either bring their own API key or rent one, and the app supports OpenAI, Azure OpenAI Service, and OpenRouter. The homepage states that documents stay on the Mac and that API keys are stored in the Apple Keychain. It also states that the app requires macOS Ventura 13 or later. The homepage does not say what content is sent to the chosen API provider when a question is asked.
Key features
- Native macOS app for chatting with one or multiple PDF files
- Answers include references to the relevant source pages
- OCR support for scanned PDFs and complex forms
- No file size limit stated on the homepage
- Support for OpenAI, Azure OpenAI Service, and OpenRouter API providers
- API keys stored in the Apple Keychain; document data kept in a local SQLite database
Best for: Mac users who regularly need answers from long or multiple PDFs, such as researchers, legal professionals, and developers reading technical documentation.
Good for
- Answers reference the source pages, so users can check them against the document
- Supports scanned PDFs through OCR and can work with multiple files at once
- Stores API keys in the Apple Keychain and documents are described as staying on the Mac
Watch out for
- Requires macOS Ventura 13 or later
- Requires an API key, either the user's own or one rented through the app
- The homepage does not state what data is sent to the chosen API provider
PDF Pals at a glance
- Website
- pdfpals.com
- Category
- AI & Machine Learning › AI Search & Research
- Type
- Online tool
- Pricing
- Free trial
- Platforms
- macOS, Web
- Open source
- Not stated
- Language
- English
- Last checked
- Oct 6, 2026 · Online when checked
- Listed
- Oct 5, 2026
PDF Pals alternatives
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Slashspace, formerly RabbitHoles AI, is an infinite canvas for AI chat and research.
Arena lets visitors chat directly with AI search models, compare their outputs, and test prompts.
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PDF Pals FAQ
Does PDF Pals support scanned PDFs?
Yes. The homepage states that PDF Pals supports scanned PDFs and complex forms using an OCR engine.
Can I chat with multiple PDFs at once?
Yes. The homepage states that users can open one or multiple PDFs and ask questions across them.
Is an account required to use PDF Pals?
No account is required. The homepage says users download the app, set up an API key, and can start using it.
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