Edit a PDF
Add text, highlights and freehand pen annotations anywhere on your pages, then flatten and download. Everything is drawn and merged on your device.
How it stays private
Frequently asked
Does my file get uploaded to a server?
No. Every operation on Papyrus runs inside your browser using WebAssembly. Your file is read from disk into your tab’s memory, processed there, and written back out as a download. Watch the network counter in the header — it stays at zero from the moment you add a file.
Does it work offline?
Yes. After your first visit the app and its WebAssembly engines are cached by a service worker, so you can process files with no internet connection at all — the ultimate proof nothing is being uploaded.
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