How to use Protect PDF
Set a password and encrypt the PDF locally in your browser. The downloaded PDF requires your chosen password to open. Store the password safely; this website does not keep a copy.
Select one pdf and a password from your device.
Check filenames, total size, format, available settings, and privacy mode.
Process the file and review result size, type, and elapsed time before downloading.
When this tool is useful
The downloaded PDF requires your chosen password to open. Store the password safely; this website does not keep a copy. The dedicated page keeps the task focused and provides a shareable URL you can bookmark for later use.
Privacy and file handling
Your file and password remain in browser memory. The PDF is encrypted on this device. Refreshing or closing the page clears the workspace.
Frequently asked questions
Is Protect PDF free to use?
Yes. This tool is free and does not require an account. Browser memory and device performance determine the practical file-size limit.
Are files uploaded while using Protect PDF?
No. Files are loaded and encrypted locally in your browser. The tool does not upload them to a server.
What output does Protect PDF create?
The expected result is encrypted pdf. After processing, the page shows the output filename, size, format, and processing time before download.