Lock PDF & Add Password

Secure your PDF files with strong password encryption. This tool converts your PDF pages to images and creates a password-protected PDF that preserves your original content with full password access control.

How it works: Your original PDF is converted to high-quality images and embedded in a new password-protected PDF. When you open the protected PDF and enter the password, you'll see your complete original content.

Important: Processing large PDFs may take some time as each page is converted to preserve quality. The protected PDF will require the password you set to access the original content.

Choose PDF Files

or drag and drop PDF files here (max 20MB per file, multiple files supported)

Set Password Protection

Password (Required)

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Confirm Password

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Image Quality

PDF Security Options

Allow Printing

Allow Copying Content

Allow Modifying Document

Add Security Watermark

Security restrictions will be applied to the protected PDF.

Lock PDF & Add Password - Secure Your Documents Instantly

Our Lock PDF tool allows you to protect sensitive files by adding a strong password. The tool converts your original PDF pages to high-quality images and embeds them in a password-protected PDF, ensuring your content is safe, private, and accessible only with the correct password.

How to Access Your Protected PDF

Step 1: Download your protected PDF file

Step 2: Open the PDF in any PDF viewer (Adobe Acrobat, Chrome, etc.)

Step 3: Enter the password you set when prompted

Step 4: Your original content will be displayed as high-quality images

Key Features That Make Our Tool Special

✓ Real Password Protection

Creates genuinely password-protected PDFs that require authentication to access

✓ Original Content Preserved

Converts PDF pages to high-quality images maintaining all visual elements

✓ Universal Compatibility

Protected PDFs work with all major PDF viewers and applications

✓ Batch Processing

Lock multiple PDF files at once with the same settings

✓ 100% Private

All processing happens locally — your PDFs never leave your device

✓ Quality Control

Choose image quality to balance file size and visual clarity

Who Can Benefit From This Tool?

Businesses & Professionals

Perfect for securing confidential contracts, agreements, and reports

Students & Educators

Great for protecting assignments, research papers, and notes

Personal Use

Ideal for safeguarding personal files, ID scans, and private documents