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Password Protect PDF Online Free - Encrypt PDF
Add password protection to PDF files online for free. Encrypt your PDF with RC4-128 encryption to restrict who can open, print, or copy it.
Drop a PDF here or click to browse
Up to 50 MB · PDF only
ℹAbout Protect PDF
Secure your PDF documents by adding password protection directly in your browser - nothing is uploaded to any server. Set an open password that must be entered to view the PDF, control print and copy permissions, and optionally set a separate owner password. Your file is encrypted using RC4-128, the standard PDF encryption compatible with Adobe Acrobat, Chrome, Apple Preview, and all major PDF viewers.
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?Frequently Asked Questions
What type of encryption is used?
PDFs are encrypted with RC4-128 (Standard Security Handler Rev 3), the PDF encryption standard supported by all PDF viewers including Adobe Acrobat, Chrome, and Apple Preview.
Can I set different passwords for opening and editing?
Yes. You can set a user/open password (required to view the PDF) and an optional separate owner password that controls permissions like printing, copying, and editing.
Is my PDF uploaded to a server?
No. Everything runs entirely in your browser. Your file never leaves your device.
Which permissions can I restrict?
You can choose to allow or block printing, text copying, and editing/annotating independently.