Protect PDF
Encrypt your PDF with a password. Secure, client-side, and free.
Click to Upload or Drag & DropPDF files only (Max 50MB)
How to Password Protect PDF Files Online
Secure your sensitive documents with military-grade AES encryption directly in your browser.
- **Fast & Secure**: Encryption happens instantly on your device via WebAssembly.
- **Zero Uploads**: Your files never touch a server.
- **Universal Compatibility**: The protected PDFs work on any device or standard PDF reader.