pdf-protect

name	pdf_protect
description	Add or remove password protection on PDF files. Use when: user asks to encrypt, password-protect, unlock, or decrypt a PDF. Supports owner and user passwords with permission controls. NOT for: digital signatures, certificate-based encryption, or DRM.
dependencies	PyPDF2
metadata	{"emoji":"🔒"}

PDF Protect Skill

Add or remove password protection on PDF files using PyPDF2.

When to Use

✅ USE this skill when:

• "Password protect this PDF"
• "Encrypt report.pdf"
• "Remove password from this PDF"
• "Unlock this PDF — password is 1234"
• User wants to add or remove PDF encryption

When NOT to Use

❌ DON'T use this skill when:

• Digital signatures → use dedicated signing tools
• Certificate-based encryption → use specialized PKI tools
• DRM protection → not supported
• Reading PDF content → use pdf_reader

Usage/Commands

Encrypt a PDF

python {skill_path}/protect_pdf.py encrypt INPUT_PDF OUTPUT_PDF --password SECRET [options]

Options:

• --password SECRET — user password (required to open the PDF)
• --owner-password SECRET — owner password (for permissions; defaults to user password)
• --no-print — disable printing
• --no-copy — disable text copying
• --format json — output result as JSON

Decrypt a PDF

python {skill_path}/protect_pdf.py decrypt INPUT_PDF OUTPUT_PDF --password SECRET [options]

Options:

• --password SECRET — password to unlock the PDF
• --format json — output result as JSON

Examples

• "Protect with password" → python {skill_path}/protect_pdf.py encrypt doc.pdf protected.pdf --password mypass
• "Restrict printing" → python {skill_path}/protect_pdf.py encrypt doc.pdf out.pdf --password pass --no-print
• "Unlock PDF" → python {skill_path}/protect_pdf.py decrypt locked.pdf unlocked.pdf --password pass123

Notes

• Install dependency: pip install PyPDF2
• AES-128 encryption is used by default
• If owner password is not set, it defaults to the user password