Add password protection to your PDF files
Uses AES-256 PDF encryption. Keep your password safe; it cannot be recovered if lost.
Drag & drop your PDF here
or
Max 100MB
The field notes
A little context for your next step.
Add password protection to a PDF using AES-256 encryption. Enter an opening password and optionally a separate owner password, then download the protected copy. Your PDF and passwords are sent to the server for encryption. Keep the password safe and check that the downloaded PDF opens with it before sharing. Use the separate PDF Permissions tool to configure printing, copying and editing restrictions.
Select the PDF you want to protect with a password.
Enter an opening password and, optionally, a separate owner password.
Your password-protected PDF is ready for secure sharing.
PDF FLINT uses AES encryption, the same standard used by banks and governments, to protect your PDF documents.
Yes, you can set an owner password for full access and a user password that restricts certain actions.
No, any standard PDF reader (Adobe Reader, Preview, browser) can open password-protected PDFs when the correct password is entered.
Yes, use our Unlock PDF tool with the correct password to remove protection from your PDF.
Your PDF and passwords are sent to the server for encryption. See the privacy policy for file-handling details.