Netlify CMS https://www.netlifycms.org Uses Git as a backend, surprisingly awesome Demo
IMP! (Its My Page!) https://github.com/girobusan/imp WORKS ON NEOCITIES EVEN!
When you load IMP! Locally, it opens up an editor, where you can enter or import your text, setup SEO tags and custom CSS. When the very same page is served over http, user gets a light, static HTML. Page does not require Java Script to be viewed, it's just plain HTML. Demo.
Defunct - I found "Vapid" https://www.vapid.com/ - Defunct
Then it might be easiest to use this, and just totally "web interface it" using
You can even save your "working edit"folders to a cloud instead of pc
(like degoo's free 100gb cloud storage)
Then Finally use your perfered online "file minimizer for css/html/images etc"
(BUT KEEP YOUR WORKING COPIES FOR EDITS)
Example I made for you today to show it works:
edit: see here
Lektor - An easy to use static CMS and blog engine. - #Python <PURE HTML STILL NOT ON THE SITE HEADLESS CMS, TESTED BY ME, EASY/WORKS
^ THIS IS A "HYBRID" SSG/SSR, think less-techie user focused jekyll with "live in browser refresh" on file save (at this point its a "HOW NICE IS "WYSIWYG" YOUR TEXT EDITOR" issue)
Once all setup (very techie) this is it:
Here is the "WYSIWYG" part, super no tech easy:
Yellow - For people who make websites. - NO ITS: #PHP
TL;DR: You want to go here: https://getpublii.com/ , Its a "DESKTOP" SSG with Upload
Its the current popular "heavy" app, along with Open element (mid-weight) and Rocket-Cake (pretty light/portable). If desktop is forever "NO" run it from gitpod or w/e
Its not "an online csm" but even Bludit CSM (https://www.bludit.com/) & Pico CMS (http://picocms.org/)... the most minimalistic I can find (ps Bludit rocks) use PHP with JSON and both use a simple WYSIWYG interface to HTML via markdown
Jump over to https://neocities.org/tutorials
Neocities is DESIGNED on purpose as "exactly what your doing" a non-php based HTML/CSS BASED "static host"
They understand 99.9% of ppl are used to CSM's like Wordpress/Joomla. They suggest the "most used" generators.
I will directly reproduce the paragraph below:
Static Site Generators
Static site generators allow developers to make a web site that has many properties of dynamic web sites, except it generates static HTML which can then be uploaded to Neocities.
I also suggest you check the article: https://dev.to/matfrana/server-side-rendering-vs-static-site-generation-17nf
As the title says its about the world of SSR (server side rendering) vs SSG (static site generation).
SO, unless you get a way around needing a "SSH to PHP" process thats that.