myhtml VS litehtml

This is, fundamentally, just string processing. You can do it manually (i.e. write all the string handling logic yourself). You can do it via regular expressions (regex). Or you can use a library to do the work for you (e.g. "myhtml" for C++, though "Beautiful Soup" and Python will still be easier). And, of course, you can combine these approaches.

if you want to parse it, there is only https://github.com/lexborisov/myhtml

Nice review, thanks! There are also: Ultralight (based on Webkit), LiteHTML, Tkhtml3 and Lobo Evolution. See also timeline of web engines.

That's why a lot of QT base app don't use it for rendering markdown. And building it would not be that hard see litehtml requirement, I just need to find the time to do it.

Maybe you could use something like https://github.com/litehtml/litehtml instead of a full embeddable Browser and save a lot of overhead?

Incorrect: for example, the last commit for litehtml was 4 days ago.