Password Protect PDF
Apply genuine AES-256 PDF encryption locally with a password you choose.
Processing happens locally in your browser. Your files and inputs are not uploaded to our servers.
How to use Password Protect PDF
- Choose a PDF up to the stated size limit.
- Enter and confirm a strong password that you can retain securely.
- Encrypt locally, download the protected PDF, and test it with the password.
What Password Protect PDF does
PDF encryption requires changes to the document encryption dictionary and object streams. This tool uses qpdf compiled to WebAssembly to apply genuine AES-256 user-password protection locally.
Examples
- Require a password before a recipient can open a PDF.
- Create an encrypted copy while retaining the unprotected original.
- Test the protected result in a current PDF reader.
Frequently asked questions
Is my input uploaded?
No. This tool processes its input locally in your browser. Normal page requests do not include the contents you enter or select.
Can CreftyTools recover a forgotten password?
No. The password and document never reach our server. Keep the original file and password in a secure location.
Will it work in every browser?
The tool uses modern browser APIs. Current Chromium, Firefox, and Safari releases provide the best support; the page displays a clear error when a required capability is unavailable.