Just copy/paste your Markdown text and it will be converted into HMTL, providing you both the raw HTML and its preview. Simple and effective, just as the Markdown principle.
In case you have not used it before, or used without even knowing it: Markdown is a lightweight markup language created by John Gruber in 2004, designed to be easy to read and write in plain text while allowing for simple formatting. It enables users to structure text using intuitive symbols—such as asterisks for bold or italics, hash signs for headings, and dashes or asterisks for lists—making it ideal for writing documentation, blog posts, and notes. Its simplicity and widespread support across platforms like GitHub, Reddit, and Discord have made it a popular choice for both developers and casual users alike.