Free Online Protect PDF
Add password protection to your PDF files instantly — 100% private and secure.
Protect PDF with Password
Upload a PDF and set a strong password to restrict access. All processing happens in your browser.
How to Protect PDF with Password Online for Free in 2026
Keep your sensitive documents secure by adding password protection. Our free online PDF protector allows you to encrypt PDF files with a password so only authorized people can open them.
This tool runs entirely in your browser using modern encryption standards. Your PDF files and password never leave your device, ensuring maximum privacy and security.
Key Features
- Strong Encryption: Uses industry-standard PDF encryption.
- Custom Permissions: Control printing and text copying.
- 100% Private: No files are uploaded to any server.
- Free & Easy: No registration, no limits, no watermarks.
Common Use Cases
Protect contracts, financial reports, legal documents, medical records, confidential business proposals, and personal documents before sharing.
Frequently Asked Questions
Is this PDF protector free?
Yes. Completely free with no registration, no limits, and no watermarks.
Is my PDF and password safe?
Yes. Everything is processed locally in your browser. No data is sent to any server.
What type of password protection is added?
It adds an "Open Password" (user password) that must be entered to view the PDF.
Can I set different permissions?
Yes. You can allow or restrict printing and text copying.
Will the protected PDF work everywhere?
Yes. The resulting PDF works with Adobe Acrobat, Chrome, Edge, and most PDF viewers.