A Markdown converter turns plain-text Markdown into a polished format like PDF, Word, or HTML for sharing — or works the other way, turning an HTML page, a Word document, or a spreadsheet into clean Markdown you can edit as plain text. Most people need both directions at different points: writing in Markdown and then exporting it for a reader who expects a PDF or a Word file, or pulling content from somewhere else into a Markdown-based wiki, README, or static site.
Every converter below is a small, focused tool rather than one do-everything form, and every one of them converts in your browser — no file upload, no account, and no server round-trip. Pick the tool that matches the format you have and the format you want.