Password protect a PDF with AES-256, right on your phone

Overview

Enter a password to open, repeat it, and iEdit encrypts the PDF with AES-256, the encryption defined in PDF 2.0, on both iOS and Android. Optionally add a permissions password and choose what readers may do without it: print, copy text and images, or edit. You can also leave the open password empty and only restrict the file, so anyone can read it but nobody can print or copy from it without the permissions password.

Passwords may contain English letters, digits and symbols only. iEdit limits them to ASCII on purpose: Apple's apps cannot open AES-encrypted PDFs whose password contains other characters, so a password with ç or ü would lock you out on a Mac or iPhone. Keep the password somewhere safe, because it cannot be recovered. The locked file is saved as a new PDF in My files and the original stays unprotected; delete it yourself if only the locked copy should remain.

Lock a contract before it goes by e-mail, a payslip or tax return you keep on your phone, scans of your passport and ID card, or a report that may be read but not copied. The encryption happens on your device: the document and the password are never sent anywhere, and the tool works offline. Opening the file later in another reader simply asks for the password you set.