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Protect PDF with Password

Add an open password to a PDF with AES-256 encryption and choose whether printing, copying and editing are allowed. Your original file is left as it is.

1
Select PDF
Drop the PDF you want to encrypt, or click to browse
2
Set password
Enter a password and choose permission restrictions
3
Download
Download your protected PDF instantly

Frequently Asked Questions

What encryption level is used?

AES-256 encryption is used, the same standard used by banks and governments.

Does this preserve bookmarks and form fields?

Yes. The whole file is encrypted as it is, so its bookmarks, links, form fields, comments, attachments and document title all stay, and the form can still be filled in once the file is open.

What PDF versions are supported?

Encryption works on PDF 1.0 through 2.0. The output uses AES-256, the standard current PDF readers open.

Tool history

Updated Nov 4, 2026 · 3 updates
  • Nov 4, 2026fixkeep bookmarks, forms, attachments and the title when protecting a PDF
  • Nov 4, 2026fixkeep data after a JPEG only when it is read in full and holds no location
  • Nov 3, 2026fixwrite AES-256 revision 6, the current PDF password standard
See full history →
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