Protect PDF with Password
Add strong protection to your files easily and safely
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Click here to choose a PDF file
Supports PDF files
File protected successfully!
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How does this tool work?
- Choose file: Upload the PDF file you want to protect.
- Password: Enter a strong password and confirm it.
- Protect & download: Click "Protect" and download the encrypted file.
Frequently Asked Questions
No, the tool runs entirely inside your browser. The file never leaves your device.
We use AES-256 encryption (the modern standard) via the @pdfsmaller/pdf-encrypt library.
Yes, you can open the file in any PDF reader that supports this feature and enter the password to remove it.
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