unlock_pdf.py

# /// script
# dependencies = ["pikepdf"]
# ///

# Usage: pipx run unlock_pdf.py path/to/locked.pdf
# ref: https://methane.hatenablog.jp/entry/2024/01/11/PDF%E3%82%92%E3%82%BF%E3%83%96%E3%83%AC%E3%83%83%E3%83%88%E3%81%A7%E8%AA%AD%E3%82%80

import sys
from pathlib import Path

from pikepdf import Pdf

src = Path(sys.argv[1])
dest = Path(src.with_stem(src.stem + "-unlocked"))
with Pdf.open(src) as pdf:
    pdf.save(dest)