PDF Locker - Password Protect PDF

Add a password to your PDF file to keep it secure. Choose AES-128 or AES-256 encryption – everything is processed privately in your browser.

PDF Locker Encrypt PDF Password Protect AES Encryption

Drop your PDF here

or click to select a PDF file

What is the PDF Locker Tool?

The Web tool Bazar PDF Locker adds a password to your existing PDF files, encrypting them with industry‑standard AES encryption. Once locked, the PDF can only be opened or viewed by entering the correct password. This tool is perfect for protecting sensitive documents like contracts, invoices, or personal records. All encryption happens directly in your browser, so your files never leave your device.

How to password protect a PDF

Upload your PDF

Drag & drop a PDF file or click "Select PDF".

Set a password

Enter a strong password and confirm it. Choose AES-128 or AES-256 encryption.

Encrypt & Download

Click "Encrypt PDF" and then download the password-protected file.

Frequently Asked Questions

What happens if I forget my password?

Unfortunately, there is no way to recover a lost password. Keep it safe and memorable.

Which encryption level should I choose?

AES-256 is the most secure option and recommended for sensitive documents. AES-128 is faster and still very secure.

Is my PDF file uploaded to a server?

No. All encryption runs locally in your browser. Your file is never sent anywhere.