Most online PDF tools require you to send sensitive files and promise they’ll delete them “after 2 hours.” That includes sensitive, even password-protected documents — which still get processed server-side. That model fundamentally relies on trust. With SecureLocalPDF, there’s no upload step at all — everything happens locally in your browser, so your files never leave your device.

It supports upto 20MB PDF instantly, 50MB PDFs with 2 to 3 second latency and 100MB PDFs with 5-6 second latency. All these depends on browser and the user device performance.

Check out - https://securelocalpdf.com/

Please leave feedback for any improvement.

( There are couple of known UI bugs to iron out)