How to password-protect a PDF on iPhone
A complete guide to adding a password to any PDF on iOS — from the native options to the fastest one-tap workflow. No Mac required.
Come mettere una password su un PDF da iPhone
Guida pratica per proteggere un PDF con password direttamente da iPhone o iPad, senza usare il Mac e senza inviare il file online.
How-to · iOSHow to remove a known password from a PDF on iOS
When you own a password-protected PDF and no longer want to type the password every time, here is the safe way to remove it on iPhone.
Guide · EmailHow to send a confidential PDF via email safely
Email is not private by default. Here is how to actually protect a sensitive PDF before you hit Send — and what not to do.
Guide · SecurityBest ways to secure a PDF document in 2026
Passwords, permissions, redaction, watermarks: a realistic overview of what actually protects a PDF today and what just looks like security.
Explainer · EncryptionPDF encryption explained: 128-bit vs 256-bit
What do those numbers on a “secure” PDF actually mean? A plain-English guide to PDF encryption, AES, and what you really need.