π PDF Password Encryption
Add password protection to your PDF files with user and owner passwords using AES-128/256 encryption. Everything runs locally: Encryption Level and other values are processed on your device, never sent to a server.
Click to select PDF or drag & drop here
Max 50MB
π How to Use
1. Upload PDF: Click the upload area or drag and drop your PDF file.
2. Set Passwords: Enter a user password (required to open) and owner password (optional, controls permissions).
3. Choose Encryption: Select AES-128 or AES-256 encryption level, then click Encrypt PDF.
4. Download: The encrypted PDF downloads automatically when ready.
β Frequently Asked Questions
Can I use PDF Password Protector on my phone?
Yes. PDF Password Protector is fully responsive and works on phones, tablets, and desktops. The interface adapts automatically to your screen size.
Are there any usage limits for PDF Password Protector?
PDF Password Protector has no usage limits β it's free and unlimited. Since processing is done client-side, speed depends on your device. For very large files, we recommend processing in batches for the best experience.
Do I need to install any software?
No. PDF Password Protector is a web-based tool β just open it in your browser and start using it. No downloads, plugins, or extensions required.
Is my data safe when using PDF Password Protector?
Absolutely. Everything runs locally: Encryption Level and other values are processed on your device, never sent to a server. No data is sent to any server, so there's zero risk of data leaks. Your information stays completely under your control.
Does PDF Password Protector upload my data to a server?
No. PDF Password Protector uses client-side processing β everything runs in your browser. Your data never leaves your device, and the tool works even without an internet connection.
Will the PDF quality decrease after processing?
We preserve original quality whenever possible. For compression, you can choose the compression level to balance file size and quality.