I built it to share my own stacks from the early '90s, which have been sitting on old floppy images for 30 years.
It's MIT-licensed and I'd welcome contributions - especially stacks that break the converter, since I've only tested it against my own. If you have old HyperCard files lying around, I'd love to hear how they fare.
Show HN: HyperCard to HTML Converter
github.com