Encrypt your PDF with a real password.
Encrypt your PDF with a real password. Protect PDF runs entirely in your web browser, so your file is processed on your own device and is never uploaded to MyPDFMate.
Answers to the questions people ask most about using Protect PDF.
Open Protect PDF on MyPDFMate, upload your file, type a password and click Protect PDF. The downloaded copy asks for that password every time it's opened.
Yes. Protect PDF is free, needs no sign-up and works in any browser, with no Acrobat Pro required.
MyPDFMate encrypts the file with AES-256, the strongest standard PDF encryption. Security then depends on your password, so use 12 or more characters that aren't easy to guess.
Yes. With Protect PDF the content itself is encrypted, not just hidden behind a prompt, so it can't be read without the password.
Yes. Encryption happens in your browser, so your file and your password are processed in your browser.
It can't be recovered. MyPDFMate never sees your password. Keep an unprotected original somewhere safe.
In Preview, choose File → Export, tick Encrypt and set a password, or use Protect PDF in Safari.
Choose File → Save As → PDF → Options and tick Encrypt the document with a password.
Yes. Adobe Reader, Chrome, Edge, Mac Preview and phone PDF viewers all open AES-256 PDFs once the password is entered.
Send the password separately from the file, for example by text message or phone call, never in the same email.
Use Unlock PDF: enter the current password and download a copy that opens without one.
Protect PDF handles one file at a time. Combine them first with Merge PDF to protect them together with one password.