Privacy Policy

Information we collect

None. oPDF does not collect, store, transmit or sell personal information. There is no sign-up, no login, and nothing in the app that tracks how you use it.

Your documents

PDFs you open are read straight from your own storage and displayed on your screen. Their contents are never uploaded, and neither the developer nor any third party can see them.

Annotations, signatures and form entries you make are written back into your own file, in the place you choose to save it.

Data stored on your device

To make the app usable, oPDF keeps a small amount of data in its own folder on your computer: a list of recently opened documents (file name, location, page count and last read position), the system permissions that let it reopen those files without asking you again, and your preferences such as language, theme and sidebar state.

If you use Layout Analysis, the recognition models and the recognized text for each document are kept in the same folder, so a file never has to be recognized twice. The recognized text is a separate layer and is never written into your PDF.

This data stays on your device. You can clear the reading history from inside the app at any time, and removing the app removes it entirely.

Network access

oPDF displays PDFs entirely offline. Everything it needs is built into the app, so it downloads nothing while you read.

The one exception is Layout Analysis, which recognizes the text on scanned pages. It never runs on its own; the first time you use it, oPDF downloads the recognition models (about 4 GB) from HuggingFace or ModelScope — you can pick the source in Settings. That download only fetches model files and sends nothing about you or your documents. Once the models are installed, recognition runs entirely on your own computer.

When it starts, oPDF also asks the store you installed it from (the Mac App Store or the Microsoft Store) whether a newer version is available, so it can let you know about updates. That check carries none of your documents and no personal information.

If a future version adds any other optional feature that needs the network, it will be off until you turn it on, and this policy will be updated before that feature ships.

Third parties

oPDF carries no advertising, no ad attribution and no analytics of any kind, and shares no data with third parties. Apple and Microsoft may collect their own download and crash statistics through the store you installed from, subject to their privacy policies rather than this one.

Children

oPDF is not directed at children and collects no personal information from anyone, including children under 13.

Changes to this policy

If this policy changes, the updated version will be posted on this page with a new date above, and the change will ship alongside the app release it applies to.

Contact

Questions about this policy or about privacy in oPDF: support@opdf.app