Tools

Protect a PDF with a Password

Encrypt a PDF with a password locally and download a protected copy.

Choose an unencrypted PDF, enter and confirm a password, then create an AES-256 encrypted copy locally with qpdf. The file and password are not uploaded or logged. If the password is lost, this tool cannot recover it, so keep a secure record and retain the original.

The PDF and password stay in this browser. Passwords are not logged or included in analytics.

Drop a PDF here or choose a filePDF up to 40 MB

A fresh temporary worker performs the encryption and is terminated when the job finishes or is cancelled.

How to use this tool

Choose an unencrypted PDF and enter the password twice.
Create the protected copy in the browser.
Download the new PDF and test the password before discarding any original.

Ways to use it

Protect a shared document: Require a password before a recipient can open a PDF copy.
Prepare an archive copy: Add encryption before storing a document in a less controlled location.

Supported files and limits

Lost passwords cannot be recovered by this tool.
Encryption restricts opening the file but does not control screenshots or copies made after opening.

Common questions

Is my input uploaded?

No. Processing happens in this browser. The selected files or text are not sent to a conversion service.

Which encryption is used?

The browser qpdf engine creates a PDF using 256-bit encryption.

Protect a PDF with a Password

Encrypt a PDF with a password locally and download a protected copy.