PDF Tools
Password Protect PDF — Encrypt Without Uploading
Add a password to a PDF using strong AES encryption, entirely in your browser. The file is encrypted on your device and never uploaded — so protecting a confidential document does not mean handing it to a server first. No account required.
Drop a PDF to password-protect
Your files never leave your browser.
Frequently Asked Questions
- Are my files uploaded?
- No. Encryption runs in your browser via a WebAssembly build of qpdf. Your file never leaves your device.
- What encryption is used?
- AES-256. Anyone opening the PDF afterwards must enter the password you set.
- What if I forget the password?
- It cannot be recovered — that is the point of encryption. Store it somewhere safe.