🔒 PDF Tools

Password Protect
Your PDF

Add AES-256 encryption to your PDF. Set a password so only you can open it.

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Drop your PDF file here
or click to browse from your device
Single PDF only • Max 50MB • AES-256 encryption
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AES-256 Encryption
Military-grade encryption. Password required to open the PDF.
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Instant Protection
Powered by qpdf — fast, reliable, industry-standard tool.
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Auto-Deleted
Files are permanently deleted from the server after processing.

What is PDF Protect?

ToolLove's PDF Protect tool lets you add password protection to any PDF with strong encryption. Set an open password (required to view) and/or an owner password (to restrict editing, printing, and copying).

We use RC4-128 bit encryption built from scratch — compatible with all major PDF readers including Adobe Acrobat, Foxit, and mobile PDF apps. This ensures your sensitive documents stay private and secure.

Supported use cases: Protecting confidential business documents, securing exam papers, restricting editing of contracts, password-protecting certificates, preventing unauthorized printing of sensitive files.

❓ Frequently Asked Questions

We use 256-bit AES encryption, the strongest standard PDF readers support. It's the same standard used by professional PDF tools.

The open password is required to view the PDF. The owner password restricts permissions like printing, copying, and editing — even if someone can open it.

Yes. You can set an open password alone, an owner password alone, or both together.

You can restrict: printing, copying text, editing content, and adding annotations.

256-bit AES is strong enough for sensitive documents. For highest security, use a long, random password.

Yes, use our PDF Unlock tool to remove a password you know.

Yes. Files are transferred over HTTPS and deleted within 1 hour. We never store or read your documents.