Is my input uploaded?
No. Processing happens in this browser. The selected files or text are not sent to a conversion service.
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.
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
Which encryption is used?
The browser qpdf engine creates a PDF using 256-bit encryption.