Markdown to HTML Converter

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Write in Markdown and publish clean HTML. Headings, links, images, lists, tables, blockquotes, and fenced code blocks convert to semantic tags, with a live preview so you can check the result instantly.

Runs in your browser. Nothing is uploaded.

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How It Works

  1. Type or paste Markdown, including headings, lists, links, and code.
  2. It parses block and inline syntax, mapping each to semantic HTML.
  3. Toggle preview, see the rendered result or the raw HTML source.
  4. Copy the HTML, paste into your site, email, or CMS.

Why It Matters

  • Write faster, Markdown is quicker than hand-coding HTML.
  • Semantic output, clean tags improve accessibility and SEO.
  • No editor cruft, output has no inline styles to fight later.
  • Portable, the same Markdown source can target many destinations.

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Markdown to HTML Reference

Markdown maps to a small set of semantic HTML tags. The table shows the source syntax, the HTML this converter outputs, and how it renders in a browser.

Markdown HTML output Renders as
# Heading<h1>Heading</h1>Top-level heading (use ## to ###### for h2–h6)
**bold**<strong>bold</strong>bold
*italic*<em>italic</em>italic
[text](url)<a href="url">text</a>A clickable link
![alt](src)<img src="src" alt="alt">An embedded image
- item<ul><li>item</li></ul>A bulleted list (use 1. for <ol>)
> quote<blockquote>quote</blockquote>An indented quotation
`code`<code>code</code>inline code
```lang … ```<pre><code class="language-lang">…</code></pre>A fenced, multi-line code block

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Markdown to HTML Converter: FAQ

Which Markdown features does this converter support?
It handles ATX headings, horizontal rules, blockquotes, fenced code blocks, simple pipe tables, flat ordered and unordered lists, paragraphs, hard line breaks, inline code, links, images, bold, italic, and strikethrough.
Does it support all GitHub Flavored Markdown?
No. It implements a focused subset rather than a complete GFM parser. Nested lists, task checkboxes, escaped pipes in tables, reference links, footnotes, automatic links, and many edge cases may remain plain text or need cleanup.
What happens to raw HTML in Markdown?
Raw HTML characters are escaped, so pasted tags appear as text rather than being passed through. Code content is also escaped. This reduces preview risk but means the tool cannot be used to mix arbitrary HTML components into the generated output.
Which link and image URLs are allowed?
Links allow HTTP, HTTPS, mailto, tel, and relative paths. Images allow HTTP, HTTPS, and relative paths. Protocol-relative URLs, whitespace or control characters, and schemes such as javascript or data are rejected and left as escaped Markdown.
How are fenced code languages handled?
Text after the opening triple backticks is reduced to letters, numbers, underscore, plus, and hyphen, then emitted as a language-* class. The tool does not perform syntax highlighting; your site needs a compatible highlighter and stylesheet.
Why did a nested list or complex table convert poorly?
List parsing collects consecutive flat markers and does not model indentation levels. Table parsing uses the next separator row and splits cells on every pipe, without alignment semantics, colspan, or escaped-pipe handling. Adjust complex output manually.
Is the live preview isolated from the page?
Yes. It uses a sandboxed iframe with a restrictive Content Security Policy. The preview permits its inline style and HTTPS or data images, while default resource loading is blocked. Still sanitize independently if another system will later accept untrusted HTML.
Is my Markdown sent to a server?
Rendering, HTML output, preview creation, and copying happen in your browser, and the Markdown is not submitted to a Web Aloha endpoint. If it includes an allowed HTTPS image, the sandboxed preview can request that image from its third-party host, which may receive ordinary request metadata.