Protect PDF with Password Online — Encrypt PDF Privately
Encrypt your PDF with standard AES-256 password protection and permission controls directly in your browser.
Password Protection
How to Use Protect PDF
Upload PDF
Select or drag and drop the document you want to secure.
Set Password & Permissions
Enter a strong open password and optionally restrict printing or copying.
Encrypt & Download
Click Protect PDF to generate your encrypted, password-locked PDF instantly.
Password protect a PDF with strong encryption
Lock a PDF with a password so only people who know it can open the file. You can also restrict printing and copying.
Encryption happens in your browser, which means your password and document are never sent anywhere. Keep your password safe: it cannot be recovered.
Common uses for Protect PDF
- Protect payslips, contracts and ID scans before emailing
- Restrict who can open financial reports
- Limit printing of sensitive material
- Secure documents stored in cloud drives
Frequently Asked Questions about Protect PDF
How secure is the encryption on PDFora?
We use industry-standard AES-256 encryption directly inside your browser. Your password and unencrypted document never leave your computer.
What is the difference between User and Owner passwords?
The User password is required to open and view the PDF. The Owner password is required to change permissions like printing and copying.
Can PDFora recover a forgotten password?
No. Because encryption happens 100% locally with zero server storage, only you have access to your password.