I'm the maker of NOS Workspace. NOS is for HTML that's already finished, like a report or a presentation. You paste the HTML in and it shows as a rendered page. To change a sentence, you click that text on the page and type. The change goes into the underlying HTML, so there's no digging through code to reword a heading.
When it's ready, you log in and save, and NOS gives you a share link. There's nothing to deploy on your own site. The people you send it to can open the link without an account. If you edit it later and save again, they can reopen the same link they already have and see the latest saved version. You don't have to send a new URL.
We use a lot of internal HTML material, and I wanted one place to collect it and share it from. Pasting, editing and previewing work without signing up, so you can try it with your own HTML at https://nos-workspace.com