Add a password and encrypt a PDF with AES right in your browser. No upload, no registration — your file and password never leave your device.
Drop or select the PDF you want to protect. It stays in your browser — nothing is uploaded to any server.
Choose a password required to open the document. Optionally add a separate owner password to restrict permissions.
Click Protect. The PDF is encrypted on your device with AES — the file and password never leave your browser.
Save your password-protected PDF. You will need the password to open it from now on.
No. Encryption runs entirely in your browser via WebAssembly — the file bytes and the password never leave your device. You can verify it yourself in the browser DevTools Network tab: no file upload happens.
Standard PDF password encryption (AES) applied by the qpdf engine running locally. The real protection strength depends mostly on how strong your password is — use a long, unique one.
No. We never receive, see, or store your file or password — so a forgotten password cannot be recovered by us. Keep it somewhere safe.
It is standard PDF AES encryption — strong when paired with a strong password, but it is not a substitute for enterprise DRM or rights management. We do not over-promise.