I don’t write Haddock markup all that often. It’s similar to Markdown but different in a few ways that I always forget. I’ve often wanted a web-based tool for previewing what some Haddock will look like. Over the weekend I put one together. I call it the Haddock Dingus, after the original Markdown Dingus. It’s pretty simple: Input some Haddock, click “Submit”, and see what the output HTML looks like. Give it a whirl and let me know what you think!