Private PDF chat for Mac
Ask your PDFs. They never leave your Mac.
Drop a PDF, a photo of a page or a document into the hYYa ai app and ask about it. hYYa Vault, the app’s on-device engine, reads it with an AI model on your Mac: no upload, no account, and no internet once the model is installed.
Summarise a long report, find a clause in a contract, pull the figures out of a statement or check what a paper actually says — privately, offline, on your own Mac.
The app is free. Sign in or sign up with email — no password, no credit card.
In your browser you get the Cloud engine. Both engines live in the app.
Apple silicon · macOS 26+
Chat with documents, privately
A private AI PDF reader for Mac: your files are read and answered on your own machine, never in someone else’s cloud.
Answers that show their source
Each answer shows where in your document it came from, so you can check it against the page.
Nothing is uploaded
Your documents stay on your Mac. Delete the app and they are gone: there is no server copy.
Works offline
Install a model once, then read and ask with the Wi-Fi off.
PDFs, photos and files
PDFs, photos of pages and other files are read and reasoned over by a model running on your Mac.
From a PDF to a report
Turn your documents into a Word report, an Excel workbook with live formulas, a PowerPoint with editable charts or an interactive dashboard, with every figure checked against the source.
Drawings too
Measure a vector PDF or a DXF drawing for a construction take-off, straight to Excel. For surveyors →
Bigger than your Mac?
A DataLens lens on hYYa Cloud works across whole document libraries. That one is online, and off until you choose it.
How to chat with a PDF offline
Download hYYa ai and pick a model
Free on the Mac App Store. The model downloads to your Mac once.
Drop in your document
A PDF, a photo of a page, or another file.
Ask
Summaries, specific facts, comparisons — each answer shows where in the document it came from.
Your documents stay on your Mac
Private PDF chat vs. uploading to a cloud AI
Questions about chatting with PDFs privately
Can I chat with a PDF offline?
Yes. hYYa Vault, the on-device engine in the hYYa ai app, reads your PDF with an AI model on your Mac. Once the model is installed, you can ask about your documents with no internet connection.
Is my document uploaded anywhere?
No. In hYYa Vault mode your documents stay on your Mac and are never sent to hYYa or to any cloud AI. Delete the app and they are gone — there is no server copy.
Does it show where an answer comes from?
Yes. Each answer shows where in your document it came from, so you can check it against the page.
Can it summarise a PDF?
Yes. Ask for a summary, the key points or a specific fact, and each answer shows where it came from.
Can it read photos of pages?
Yes. Drop in a photo of a page and ask about it, as you would a PDF.
Can I turn a PDF into a Word report or a spreadsheet?
Yes. Studio exports build a Word report, an Excel workbook with live formulas, a PowerPoint with editable charts or an interactive dashboard from your documents, on your Mac, with every figure checked against the source.
Is it free?
Yes. hYYa Vault has no subscription and no one-time unlock, and you need no account to read your documents.
Which Macs does it run on?
Macs with Apple silicon running macOS 26 or later.
What if I have more documents than my Mac can hold?
A DataLens lens on hYYa Cloud works across whole document libraries. That one is online, and off until you choose it.
Your documents. Your Mac. Your answers.
Download hYYa ai from the Mac App Store, install a model, and ask your PDFs anything — online or off.
One app — both engines. Or use Cloud in your browser.