Protect PDF
Encrypt a PDF with a password and control printing, copying and editing.
How to use Protect PDF
- 1Add your PDF
- 2Set a password and choose which actions are allowed
- 3Click Protect PDF and download the encrypted file
About this tool
Password-protect a PDF with AES-256 encryption and set permissions for printing, copying and editing. Encryption happens in your browser – we never see your file or password.
Because everything is processed locally with your browser’s own power, there is no upload wait, no file size queue and no risk of a server keeping a copy of your document.
Frequently asked questions
Is Protect PDF free?
Yes – Protect PDF is free, with no sign-up and no watermark. Free visitors get 5 runs across all tools every 2 hours; Pro (coming soon) removes the limit and the ads.
Are my files uploaded anywhere?
No. Protect PDF runs entirely in your browser, so your PDF never leaves your device and nobody else can see it. The only exception is the optional “Copy link” button: if you click it and confirm, that one file is uploaded and kept for 2 hours so you can send a download link, then deleted automatically.
Does it work on my phone?
Yes. It works in any modern mobile or desktop browser. Very large files need enough free memory on your device.