How do I add a password to my PDF?

Upload your document, enter a strong password in the required field, and click 'Protect PDF'. We will encrypt your file and provide a download link for the secure version.

What encryption standard do you use?

We use 256-bit AES (Advanced Encryption Standard), which is widely considered to be unhackable by modern computing methods.

Can I recover a forgotten password?

No. For your security, we do not store your passwords. If you lose the password to a protected document, there is no way for us to recover it.

Does this work on smartphones?

Yes! Our Protect PDF tool is fully responsive and works perfectly on iPhone, iPad, and Android browsers.

Protect PDF Online - Password Protect PDF Free | LovePDF Pro

Secure Your PDF Documents with Industrial-Strength Protection

In today's digital landscape, keeping your sensitive information safe is more important than ever. Whether you're sharing financial reports, medical records, or confidential contracts, our Protect PDF tool provides a robust layer of security that ensures only authorized recipients can view your content.

We use industrial-grade 256-bit AES encryption—the same standard used by banks and government agencies around the world. Our tool allows you to set a master password that locks the document securely. Without this password, the content is practically impossible to decrypt.

Unbeatable Security Features

256-bit AES Encryption: Your documents are protected by the strongest encryption standards available today.
Cross-Platform Compatibility: Locked PDFs can be opened in any standard PDF reader, including Adobe Acrobat, Chrome, and mobile viewers (provided the user has the password).
Zero-Knowledge Processing: Your password is never stored on our servers. The encryption happens in a secure, temporary environment.
Instant Purging: For maximum security, all files are permanently deleted from our systems shortly after you download the protected version.

Securing your files shouldn't be complicated. Our interface is designed to be fast and user-friendly, allowing you to protect any PDF in seconds from any device. No software downloads or expensive subscriptions are required for basic protection.

Need to remove a password from a file you already own? Check out our Unlock PDF tool, or use Redact PDF to permanently black out specific sensitive details.

Protect PDF