Password-protect a PDF

Add AES-256 encryption to any PDF. Everything runs in your browser — the file is never uploaded.

Drop a PDF here or click to choose

Password (required to open the PDF)

Owner password (optional)

Encryption

Loading encryption engine…

🔒 Private by design: your PDF is encrypted locally with QPDF (WebAssembly). Nothing is sent to a server. The owner password controls permissions; the user password is what opens the file. Must be served over https / http to run (the WASM engine cannot load from a local file:// path).