Important Notes:

1. This tool runs entirely in the browser using the PDF-lib library.
2. No files are uploaded to any server – processing happens locally.
3. There’s no file size limit since everything happens in the browser.
4. The tool requires the user to know the PDF’s password to unlock it

How to Use This Tool:

1. Create three separate files with the code above (index.html, styles.css, script.js)
2. Open the index.html file in a modern browser (Chrome, Firefox, Edge)
3. Drag and drop a password-protected PDF file or click “Browse Files”
4. Enter the correct password for the PDF
5. Click “Unlock PDF” to download the unlocked version

Features:

• Modern, responsive design
• Drag and drop file upload
• No file size limits (limited only by browser memory)
• Entirely client-side processing (no server upload)
• Clear status messages
• Detailed instructions
• Works with most password-protected PDFs

Limitations:

• The user must know the PDF password to unlock it
• Very large files (several hundred MB) might cause browser performance issues
• Some advanced PDF encryption might not be supported by PDF-lib