Free online Markdown to HTML and HTML to Markdown converter. Convert between Markdown and HTML instantly — supports tables, code blocks, links, and all CommonMark syntax.
This tool converts Markdown to HTML and HTML to Markdown instantly in your browser. Paste Markdown and get clean, semantic HTML output — or paste HTML and get well-structured Markdown. It supports full CommonMark syntax including headings, bold, italic, links, images, code blocks, blockquotes, lists, and tables. All conversion happens client-side using the marked library for Markdown parsing and a custom DOM-based converter for HTML to Markdown.
Use this converter when migrating content between platforms — from a Markdown-based CMS to an HTML email template, or from an HTML page to a Markdown-based documentation system. It is useful for converting README files to HTML for embedding, transforming blog post drafts between formats, and extracting clean Markdown from HTML web pages.
Developers convert Markdown README files to HTML for static websites and email newsletters. Technical writers transform HTML documentation to Markdown for GitHub wikis and Docusaurus. Content creators convert blog drafts between WordPress HTML and Markdown for static site generators like Hugo, Jekyll, and Astro. DevOps teams convert HTML release notes to Markdown for changelog files.
Essential terms and definitions related to Markdown to HTML Converter.
A lightweight markup language created by John Gruber in 2004 that uses plain text formatting syntax. Markdown files (.md) are human-readable even without rendering, making them ideal for README files, documentation, blog posts, and any content that needs to be version-controlled. The CommonMark specification standardizes Markdown parsing behavior across implementations.
A strongly defined, highly compatible specification of Markdown created to eliminate ambiguity in John Gruber's original specification. CommonMark defines exact parsing rules for edge cases that the original spec left undefined, ensuring consistent rendering across different Markdown processors and platforms.
An extension of CommonMark used by GitHub that adds features not in the original Markdown specification: strikethrough (~~text~~), task lists (- [ ] item), tables with pipe syntax, and autolinked URLs. GFM is the de facto standard for documentation in the software development ecosystem.
The converter supports full CommonMark syntax including headings (h1-h6), bold, italic, strikethrough, links, images, ordered and unordered lists, code blocks (fenced and indented), blockquotes, tables, and horizontal rules. It uses the popular marked library for Markdown parsing.
The HTML to Markdown converter handles all common HTML elements: headings, paragraphs, strong/em/del, links, images, lists (ordered and unordered), code blocks, blockquotes, and tables. Complex HTML with nested divs or custom classes will be simplified to their text content. For best results, use semantic HTML.
You can paste HTML email content, but heavily styled HTML with inline CSS and table-based layouts may not convert cleanly to Markdown. The converter works best with semantic HTML that uses standard elements like headings, paragraphs, and lists.
Yes. The marked library supports GitHub Flavored Markdown (GFM) extensions including strikethrough (~~text~~), tables, and fenced code blocks with language specification. Task lists (- [ ]) are partially supported.
No. All conversion happens entirely in your browser. Markdown parsing uses the marked library loaded from esm.sh CDN. Your content is never stored or transmitted to any server.
Common errors developers encounter and how to resolve them.
HTML to Markdown loses formatting: Complex nested HTML structures The HTML to Markdown converter works best with semantic HTML (headings, paragraphs, lists, code blocks). If your HTML uses complex nested divs, spans with styling, or table-based layouts, the structural meaning may be lost because Markdown does not support arbitrary nesting. Solution: simplify the HTML structure before converting, or manually adjust the Markdown output.
Code blocks not converting correctly: Language specification lost When converting Markdown to HTML, fenced code blocks with language specification (```javascript) are converted to <pre><code class="language-javascript">. When converting back, the language class is not currently extracted. If language specification is important, add it manually after conversion.
Table alignment lost during conversion Markdown tables support left, center, and right alignment using colons in the separator row (|:---|, |:---:|, |---:|). The HTML to Markdown converter generates basic tables without alignment. If alignment is important, add the colons manually in the separator row after conversion.