Protect PDF
Add an open password and conservative permissions to a PDF locally. Keep the password safe.
Enable JavaScript for the interactive PDFde app. This fallback keeps the core guidance, privacy notes, and related links readable without JavaScript.
Protect PDF details
Protect PDF adds browser-side encryption. Store the password safely because the site does not keep it.
File handling
- Input: One PDF file and password settings.
- Output: An encrypted PDF that requires the open password.
- Privacy: Processing runs in your browser for this live tool. PDFde does not upload the selected document contents to its servers.
Best for
- Adding an open password before sharing
- Setting conservative print/copy permissions
- Protecting a PDF after merge, sign, or watermark steps
Know before using
- PDFde cannot recover forgotten passwords
- Permissions depend on PDF viewer behavior
- This does not prove recipient identity
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