Protect PDF
Add password protection to a PDF. Set a password that will be required to open the document.
Drop files here or click to browse
Max 4096.0 MB per file · drop multiple for batch
Processed on our servers — requires a free account
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How to Use Protect PDF
- Upload the PDF you want to protect
- Enter the password you want to set
- Click Process to encrypt the PDF
- Download the password-protected PDF
Features
- Add password protection to any PDF
- Set a custom password for document access
- Standard PDF encryption for compatibility
- Server-side processing for secure encryption
Frequently Asked Questions
- How do I password-protect a PDF?
- Upload your PDF, enter the password you want to set, and click Process. The output PDF will require this password to open.
- Why is this server-only?
- PDF encryption requires low-level cryptographic operations that aren't available in the browser's PDF library. The server uses native tools for secure, standard-compliant encryption.
- Can I remove the password later?
- Yes. Use our Unlock PDF tool to remove the password and create an unprotected copy.