A tax return or a signed contract should not sit in an inbox unprotected. Filemorph encrypts a PDF with a password you set, entirely on your iPhone, before you ever hit send.

Sending a sensitive PDF by email or Messages means it can sit in someone else's inbox indefinitely. A password does not stop the file from being forwarded, but it does mean it cannot be opened by whoever it lands with next, unless they also have the password.
Filemorph encrypts the PDF using Apple's PDFKit, with an open password required to view the file, a separate permissions password that restricts printing or editing, or both together. Encryption and the password itself never leave your device — Filemorph is not a server the file passes through.
In the app: Transform → Set Password.
A password is the difference between a file that opens for anyone who receives it and one that only opens for someone who has the password you shared separately. It is a reasonable baseline for tax documents, contracts, medical records and anything else you would not want a stranger to read if the file ended up in the wrong inbox.
Yes. Unlike web converters that upload your files to a server, Filemorph converts every file locally using Apple's frameworks. Nothing leaves your device, and it works with no internet connection. This operation is part of Filemorph Pro ($29.99/year, 7-day free trial on monthly and annual plans).
An open password is required just to view the PDF. A permissions password leaves the file viewable but restricts actions like printing, copying text or editing, even without the open password.
Nowhere but the PDF itself and wherever you keep it. Filemorph does not store, transmit or have any way to recover a password you set.
Yes, if you know it. Use Filemorph's Remove Password tool with the correct password to produce an unprotected copy.
On-device, no upload. Plus 300+ more file operations.
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