Markdown has become the universal format for writing technical documentation, README files, blog drafts, and notes. At some point, that markdown needs to become HTML — for a website, email template, CMS, or documentation site. The CalcHub Markdown to HTML Converter renders markdown to HTML with a live split-pane preview, supporting all standard syntax plus GitHub Flavored Markdown extensions.

Supported Markdown Syntax

Markdown	Renders As
# Heading 1	Heading 1
bold	bold
italic	italic
` code	code
text	text
- item	item
1. item	item
> quote	quote
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GitHub Flavored Markdown (GFM) Extensions

The tool also supports:

• Tables: | Header | Header | with | --- | --- | separator rows


• Strikethrough: ~~deleted~~ → deleted


• Task lists: - [x] done, - [ ] todo


• Fenced code blocks with syntax highlighting: ``javascript


• Autolinks: URLs are automatically linked

How to Use the Converter

1. Open CalcHub and navigate to the Markdown to HTML Converter.
2. Type or paste markdown in the left pane.
3. Live HTML preview appears in the right pane.
4. Toggle between:

- Rendered preview: See the visual output - HTML source: See the actual HTML tags

1. Copy either the rendered HTML or the raw source.

Output Modes

Pretty HTML — formatted with indentation for readability:

<h2>My Heading</h2>
<p>A paragraph with <strong>bold text</strong>.</p>

Minified HTML — no unnecessary whitespace, for production use:

<h2>My Heading</h2><p>A paragraph with <strong>bold text</strong>.</p>

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Will the converted HTML include a full document structure?

By default, the converter outputs a fragment (no , , or tags) — just the content elements. This is what most CMS systems and static site generators expect. There's an option to output a full standalone HTML document with a basic document structure.

How are code blocks handled?

Fenced code blocks (using triple backticks) are converted to

 with the specified language as a class. Most syntax highlighting libraries (Highlight.js, Prism) pick up this class automatically. The preview pane in the converter applies syntax highlighting visually.


Can I convert HTML back to Markdown?

The reverse — HTML to Markdown — is a separate tool. HTML-to-Markdown conversion is inherently lossy since many HTML elements have no clean Markdown equivalent (custom styling, complex tables, etc.). Look for the HTML Tag Stripper if you just want plain text from HTML.



Related tools: HTML Tag Stripper · HTML Entity Encoder · Word Counter