Can you recover my password if I forget it?

No. Because the encryption happens entirely in your browser and we never see or store your files or passwords, it is impossible for us to recover your password. Please keep it safe.

Are my files uploaded for encryption?

Never. Our PDF Password Protector uses advanced WebAssembly and JavaScript to encrypt your document directly within your device's memory. Your sensitive files remain 100% private.

Does this tool work offline?

Yes! Because the tool processes files entirely within your web browser using client-side technologies, it will continue to work even if you lose your internet connection after loading the page.

What encryption standard does this tool use?

We use the PDF Standard Security Handler with RC4 128-bit encryption. This ensures strong security while maintaining full compatibility with all standard PDF readers like Adobe Acrobat, Chrome, and Preview.

Is there a file size limit for protecting PDFs?

Since all processing happens locally on your device, the file size limit depends entirely on your system's available memory (RAM). Most modern computers and smartphones can easily handle PDFs up to 50MB or more.

Password Protect PDF

Encrypt and lock your PDF file with a password. 100% secure, browser-based local processing.

lock

Select a PDF file

or drop PDF here

security Local Processing

Encryption Setup

Set a password to encrypt this PDF document. You will need this password to open it later.

Password

info

About PDF Password Protector

Our PDF Password Protector allows you to secure sensitive documents with RC4 128-bit encryption directly in your web browser. This ensures maximum privacy, as your files are never uploaded to any remote server.

Features

check Real RC4 128-bit encryption
check Prevents unauthorized viewing
check 100% local, client-side processing
check No file uploads required
check Fast, instant downloads

How to Use

Select or drag-and-drop the PDF you want to protect
Type a strong password in the sidebar input
Click "Lock PDF" to apply the encryption
Download the protected PDF document

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