The Markdown to HTML converter transforms Markdown-formatted text into clean HTML markup with a live side-by-side preview. Markdown is a lightweight markup language widely used for documentation, README files, blog posts, wiki pages, and content management systems. This converter supports the full CommonMark specification plus common extensions: headings (# through ######), bold and italic text, code blocks with syntax highlighting, inline code, blockquotes, ordered and unordered lists, tables, horizontal rules, links, images, and task lists. The live preview renders the HTML exactly as it would appear in a browser. The HTML output is clean and semantic, suitable for pasting directly into a CMS, embedding in a web page, or using as input to further processing. The conversion runs entirely in your browser with no server involved. Markdown to HTML is commonly used as a md to html online, making it a practical choice for everyday tasks directly in the browser. As part of a broader workflow, HTML Formatter can format and beautify HTML markup, JSON Formatter can format and validate JSON data, and Word Counter can count words, characters, and reading time.
Markdown was designed to be readable as plain text while also converting cleanly to HTML. The conversion rules are mostly intuitive but have some specifics worth knowing. Line breaks within a paragraph require two spaces at the end of the line (or a blank line to start a new paragraph). Fenced code blocks use triple backticks and an optional language identifier for syntax highlighting: ```javascript enables JavaScript highlighting. Tables use pipe characters and hyphens: the alignment row (---|:---:|---:) controls left, center, and right alignment. Blockquotes are created with a leading > character and can be nested by using multiple > characters. Links can be inline [text](url) or reference-style [text][ref] with definitions at the bottom of the document, which is cleaner for documents with many links. HTML embedded directly in Markdown passes through to the output unchanged, which allows you to use HTML elements that have no Markdown equivalent (like details/summary for collapsible sections). For blog posts, the HTML output from this converter can be pasted into WordPress, Ghost, Webflow, or any CMS that accepts raw HTML. For GitHub README files, GitHub uses a slightly modified version of CommonMark that also supports emoji shortcuts (:smile:) and relative links to repository files.