Protect PDF
Add password protection to your PDF files.
Drop a PDF file here
or click to browse
Note: Basic protection using pdf-lib. For AES-256 encryption, use desktop tools.
Frequently Asked Questions
Is this tool free to use?
Yes, completely free with no limits, no watermarks, and no signup required. Process as many PDFs as you need for personal or business use.
Are my PDF files uploaded to any server?
No. All processing happens directly in your browser. Your documents never leave your device, ensuring complete privacy and security for sensitive files.
What is the maximum file size?
You can process PDF files up to 100MB. Processing speed depends on your device and browser. Most typical documents process in seconds.
Does processing affect PDF quality?
No. Our tools preserve the original quality of text, images, fonts, and formatting in your PDF. No recompression or quality loss occurs during processing.
Can I use this on mobile?
Yes, the tool works on all modern smartphones and tablets. Upload PDFs from your files app or cloud storage. The interface is fully responsive and touch-friendly.