My requirements are thus:

1. Works offline

2. Code is not obfuscated, does not have tons of added dependencies and libraries. I’m trying to speed up codewriting, not replace it completely.

3. Is not a virus

4. Generates files which can be hosted anywhere.

Unfortunately that seems to disqualify pretty much everything I’ve been able to find with a regular search engine. It would be nice, wouldn’t it? To just have a photo-editor like program to throw a layout together, a list of divs and content, and another panel showing all the properties where you can set pixels or percentages, lock it in for non-flexible or leave it auto adjusting. Have them inherit properties from like a custom composition.