if you don't listened about markdown, then markdown is a clean and better way of writing online. You can easily export it to other formats like docx, PDF, HTML, etc.
Markdown is simple text format with some syntax so you don't need any special tool for writing markdown.
One of the most consolidated misconceptions about programming, since the early days, is the idea that such activity is purely technical, completely exact in nature, like Math and Physics. Computation is exact, but programming is not.