Zenvoq Labs

Are online PDF tools safe for ID documents?

Updated 23 October 2026 · Zenvoq Labs

Server-side vs in-browser

A server-side tool sends your PDF over the internet, processes it on the provider's computer and sends the result back. An in-browser tool downloads the processing code to your device once and does all the work locally.

How to check a tool yourself

Load the tool, then turn on airplane mode before choosing your file. If it still works, the processing is happening on your device. You can also watch the Network tab in your browser's developer tools while it runs — no file upload should appear.

Offline apps

On Android, apps like FramePDF edit and shrink PDFs entirely on the phone, with no internet connection required.

Frequently asked questions

Free Android app

Handle PDFs offline on your phone

FramePDF makes PDFs smaller, combines and reorders pages, and saves any page as a photo — all on your Android phone, without uploading anything.

  • Make PDFs smaller
  • Edit pages offline
  • Save pages to Photos
Get FramePDF on Google PlayAndroid · Free · No account · Works offline

Try it

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