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password protect and encrypt pdf online

Military-Grade PDF Security

Protect your intellectual property and sensitive data with our Comprehensive PDF Security suite. At PDFFans, we use advanced AES encryption to ensure your documents are safe from unauthorized access, printing, or editing.

How to Password Protect a PDF?

Why Secure Your Files with Us?

Enterprise-Grade Privacy

We guarantee complete privacy. No registration or personal data is required, and since processing happens in your browser, your files are never stored on our servers.

Permission Controls

Go beyond simple passwords. Restrict others from printing, copying text, or modifying your document structure with just a few clicks.

Frequently Asked Questions

Q: Is it safe to upload my sensitive PDFs here?

A: Yes! PDFFans is built on privacy-first principles. Your documents are processed locally in your browser. This means your files do not leave your device unless cloud processing is explicitly needed.

Q: What level of encryption do you use?

A: We use industry-standard AES encryption (128-bit or 256-bit), making it virtually impossible for unauthorized users to crack your password.

Q: Can I remove the password later?

A: Yes, if you have the original password, you can use our PDF Unlocking tool to remove restrictions and recover full access to your file.

Q: Does this work on mobile devices?

A: Absolutely. PDFFans is fully optimized for Windows, Mac, iOS, and Android browsers. No app installation is required.