Yes. Protect PDF is free to use for everyday tasks with no account required.

Do I need to create an account?

No. Open the tool, complete your task, and download or copy the result.

Is this the same as Add PDF Password?

Yes: the same engine powers both pages with unique SEO content.

PDF Tools

Protect PDF with a Password

Password-protect a PDF online with AES encryption in your browser using @cantoo/pdf-lib.

Private when possible
No account required

Preparing tool…

About this tool

Add an open password so viewers must unlock the file before reading. Encryption runs client-side with @cantoo/pdf-lib so the protected PDF never needs to leave your device for this step.

How to use

Upload the PDF to protect.
Enter and confirm a password.
Click Protect PDF.
Download the encrypted PDF and store the password safely.

Features

AES encryption via @cantoo/pdf-lib
User password required to open
Browser-side processing
Permission flags restrict editing/copying

Common use cases

Share sensitive contracts
Protect HR packets
Lock personal scans

Supported formats

PDF

Privacy

This tool processes data in your browser. Content is not uploaded to our servers unless a feature explicitly requires a network request.

Limitations

Password recovery is impossible if you forget it.
Viewer support for AES-256 is strong in modern readers; very old viewers may struggle.

Frequently asked questions

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