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Protect PDF with Password

Add password protection and encryption to PDF files. Restrict printing, copying, and editing. Keep the original. This tool downloads a clean copy alongside it.

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. Encryption only adds password and permission flags; bookmarks, form fields, and annotations are kept verbatim.

What PDF versions are supported?

Encryption works on PDF 1.0 through 2.0. The output uses AES-256 (PDF 2.0) or AES-128 (PDF 1.7) depending on the chosen security level.

Tool history

Updated Jun 3, 2026 · 10 updates
  • Jun 3, 2026featper-tool OG images for all 75 tools + lengthen 20 short metas (#614)
  • May 29, 2026featmobile responsive pass + design-system consolidation (#564)
  • May 23, 2026feattips on all 60 tools + HowToTip rich-result schema (#450)
See full history →
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