no. No data are shared with the server.

Yes, sadly but true.

I totally understand the concern.

That’s exactly why I suggest installing it as a PWA and then disabling network access on the PWA. In my opinion, that’s actually the best way to use it.

In-browser PDF editor

Built a client-side PDF editor. No uploads, no server everything runs in the browser.

Unlike typical tools that use overlays or server-side processing, this edits the actual PDF structure using PDF.js + pdf-lib.

Demo: https://crabpdf.com

Now the huge repaint was removed.

I will study the subject, that's the same question I had today. For now I've implement a stupid parser that convert the html to react component.