Protect PDF
Secure your PDF files with strong password encryption directly in your browser — free, instant, no account needed. Adding a password to a PDF prevents unauthorized users from opening, copying, editing, or printing your document. This is essential for sharing sensitive documents such as contracts, financial reports, medical records, or personal information. Choose an open password to restrict who can view the document, and optionally set permissions to control printing and editing. Uses AES-256 encryption for maximum security.
Protect PDF
Add password protection to your PDF files.
Drop file here or click to upload
PDF files only · Max 100MB
How to Use Protect PDF
- 1Upload your PDF by clicking "Upload PDF" or dragging and dropping it
- 2Enter a strong password in the "Open Password" field — this will be required to view the document
- 3Optionally set permission restrictions (disable printing, copying, or editing)
- 4Click "Protect PDF" to apply AES-256 encryption
- 5Download the password-protected PDF to your device
- 6Share the password securely with intended recipients (not in the same email as the PDF)
About Protect PDF
Secure your PDF files with strong password encryption directly in your browser — free, instant, no account needed. Adding a password to a PDF prevents unauthorized users from opening, copying, editing, or printing your document. This is essential for sharing sensitive documents such as contracts, financial reports, medical records, or personal information. Choose an open password to restrict who can view the document, and optionally set permissions to control printing and editing. Uses AES-256 encryption for maximum security.
Your Privacy is Protected
Protect PDF runs entirely in your browser. Your files and data are never uploaded to any server, never stored, and never shared. Everything happens locally on your device using secure browser APIs.
Frequently Asked Questions
What encryption level is used?
AES-256-bit encryption is applied, which is the same standard used by governments and banks. It is considered unbreakable with current technology.
What is the difference between open password and permissions password?
An open password (also called user password) is required to open and view the PDF. A permissions password (owner password) is required to change security settings, edit, or print the document.
Can recipients open the file on any device?
Yes. Standard PDF password protection is supported by all PDF readers including Adobe Acrobat, macOS Preview, Chrome, Firefox, and mobile PDF apps.
Is my PDF processed securely?
Yes. Encryption happens entirely in your browser using the Web Crypto API. Your PDF is never sent to any server — the entire process is private and local.
Why Use This Tool?
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