I thought printable coloring pages were “just images and PDFs.”

Then I started thinking about the actual workflow:

Generate clean line art → fix weird artifacts → make it printable → export PDF → compress files → create previews → organize categories → write SEO metadata → publish without turning the site into chaos.

Sites like Monday Mandala (https://mondaymandala.com/), Supercoloring, and ColorwithAnne (https://colorwithanne.com/) make it look easy, but the pipeline behind this kind of site seems surprisingly annoying.

For people who’ve built image-heavy or PDF-heavy websites:

How would you automate/smooth this workflow?

AI generation? Manual cleanup? Vector conversion? Static site? CMS? Scripts? Some cursed hybrid setup?

I’m mostly curious about the technical workflow, not cloning any specific site.