Protect PDF

Add a password to your PDF to restrict access. Secure, instant, and free.

or drop PDF here  ·  PDF files only

Want to remove a password instead? → Unlock PDF

How to Password-Protect a PDF

  1. 1Upload the PDF you want to secure.
  2. 2Click Protect PDF, enter a password and confirm it.
  3. 3Download your encrypted, password-protected PDF.

Frequently Asked Questions

What encryption is used?
128-bit AES — the same standard used by Adobe Acrobat.
Can I remove the password later?
Yes. Use our Unlock PDF tool with the same password.
Is there a file size limit?
Up to 100 MB for free.