Protect PDF
Add password protection to your PDF file. Your document will be encrypted so only people with the password can open it.
Drop your PDF here
One PDF, up to 100 MB·click to browse
How to password-protect a PDF
Add a user password to a PDF to restrict who can open it.
- 01
Open Protect PDF
Visit makemypdf.com/protect-pdf.
- 02
Upload your PDF
Drop the file onto the upload area.
- 03
Enter a strong password
Use a mix of letters, numbers, and symbols at least 12 characters long.
- 04
Apply protection
The backend encrypts the PDF with AES-256 and produces a locked copy.
- 05
Download the protected PDF
Save the encrypted file and share the password separately.
Frequently asked questions
What encryption is used?
AES-256, the current PDF standard for strong encryption.
Why is this not a browser-only tool?
Modern AES-256 PDF encryption is best handled by tested native libraries. Our backend applies it over TLS and deletes the source immediately.
Can you recover my password if I lose it?
No. Passwords are never stored. Losing the password means the PDF cannot be reopened.