How to convert CBZ to PDF

1. Extract the archive (cbz is just a zip, cbr is a rar, …)

2. Convert individual pictures to PDF using img2pdf

   • Many other ways including convert from ImageMagick tend to do weird stuff like breaking aspect ratios or adding margins

3. Merge files into the single PDF, e.g. using qpdf --empty --pages *.pdf -- output.pdf.