PDF Protect — Add Password to PDF
Add password protection to any PDF — set an open password, an optional owner password, and fine-tune recipient permissions. Free and secure.
How it works
- Upload a PDF file
- Set an open password to restrict access
- Optionally set an owner password for extra permissions control
- Download your encrypted PDF
PDF Protect — Frequently Asked Questions
- What is the difference between the open and owner password?
- The open (user) password is required to open the PDF. The owner password controls permissions such as printing, copying, and editing — it is optional.
- Is my password transmitted securely?
- Yes. Your file is uploaded over HTTPS. Passwords are used only during processing and are never stored or logged.
- What permissions can I control?
- You can allow or restrict printing, copying text, editing content, adding annotations, and filling forms.
- What encryption standard is used?
- The PDF is encrypted using 128-bit RC4 encryption, the standard for PDF password protection across all major viewers.
- Can the recipient remove the password?
- They can remove restrictions only if they know the correct password. Without it the encryption cannot be bypassed.
Files are processed securely and permanently deleted after download. Never stored or shared.