What offline means
The iPhone app processes PDFs locally and does not request network access. Your file does not need to leave the device to become smaller.
Why it matters
- No upload queue where private files sit on someone else's server.
- No account required just to reduce file size.
- No analytics or ad tracking inside the app.
Browser version
The browser tools are also local-first: after the page loads, PDF work happens in your browser and document content is not sent to a server. Use the iPhone app when you need the workflow to be offline from start to finish.
Open App Store link Try browser tool
FAQ
Can I compress PDFs without internet?
Yes. The iPhone app is designed for offline PDF compression and requests no network access.
Is the browser compressor offline too?
The browser tools run client-side after the page loads. For a fully offline mobile workflow, use the iPhone app.
What files should stay offline?
Contracts, IDs, medical paperwork, tax forms, school documents, and invoices are good candidates for local compression.