Source Editor tool (beta) is a simple HTML file (web page) with a few lines of code.
- works online (can be uploaded on a host) or offline (runs from your laptop/pc)
- option to view edit and render web pages or code snippets
- load an entire web page into editor too, edit the source markup and save
- option to resize the Rendering frame/window No dependencies, all js, css, html markup codes and programming language run from the same single file.
I personally use this simple SE when coding some basic templates for CB/NF bios. Some of our designs have a similar source editor tool already provided in the downloaded file.