Protect PDF
Mark a PDF with a password label for restricted sharing (lightweight access control, not AES encryption).
Drop a PDF to protect
or click to browse
How to use Protect PDF
- 1
Drop a PDF.
- 2
Type the password label you want to associate with the file.
- 3
Click Mark as protected and download.
Runs in your browser
This tool runs in your browser. Your files are processed locally and never leave your device.
Credit usage
Your first document is free. After that, each use costs 15 credits (~$0.15). Credits never expire.
See full pricing →Frequently asked questions
Does this apply real AES encryption?
No. This tool stamps a password label into the document so people sharing it know it's restricted. It does not encrypt page content. For true AES encryption, use a desktop tool like qpdf — we'll be adding a server-backed encrypted option soon.
Will Adobe Reader prompt for the password?
No — this is metadata-only, not real encryption. We're clear about that so you don't rely on it for sensitive content.
Is the first use really free?
Yes. Every visitor gets one free document per tool. Signed-in accounts also get one free document, then each use costs credits.