Markdown to HTML converter, convert Markdown with live preview

Need to convert Markdown text to HTML for publishing or embedding? Use ToolHQ's free Markdown to HTML converter to get instant HTML output with a live preview right in your browser.

ToolHQ's Markdown to HTML converter is a free browser-based tool that converts Markdown text to HTML with a live preview of the rendered output, with your content never sent to any server.

Markdown is the writing format that powers GitHub READMEs, blog posts, documentation systems, and content management tools worldwide. This converter turns your Markdown into clean, usable HTML in real time.

Key Takeaways

• Live preview shows exactly how the HTML will render as you type
• Supports GitHub Flavored Markdown (GFM) including tables, task lists, and fenced code blocks
• Your content never leaves your browser -- conversion runs entirely client-side
• Output is clean semantic HTML ready to paste into any CMS, email, or web page
• Free with no login and no rate limits

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What is Markdown and why convert it to HTML?

Markdown is a lightweight markup language created by John Gruber in 2004. It uses simple plain-text formatting conventions that are readable as-is and can be converted to HTML for web display. A # becomes an <h1>, **bold** becomes <strong>bold</strong>, and [link](url) becomes <a href="url">link</a>.

According to the CommonMark specification, Markdown was originally an informal description by John Gruber, which led to multiple incompatible implementations. CommonMark was created to standardize Markdown syntax across different tools. GitHub Flavored Markdown (GFM) extends CommonMark with tables, task lists, strikethrough text, and autolinks -- the extensions that have become most common in developer-facing documentation.

The Wikipedia article on Markdown traces the format's origins to the desire for a writing syntax that looks good in plain text AND produces valid HTML. This dual readability is why Markdown has become the default writing format for:

• GitHub and GitLab README files and documentation
• Static site generators (Jekyll, Hugo, Gatsby, Next.js)
• Content management systems like Ghost, Netlify CMS, and Contentful
• Note-taking apps like Obsidian and Notion
• Technical documentation platforms like ReadTheDocs

Converting Markdown to HTML is necessary whenever you need to embed Markdown-authored content in a system that doesn't natively render Markdown -- like a standard HTML page, a custom CMS field, or an email template.

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When you need a Markdown to HTML converter

The Markdown-to-HTML conversion need comes up wherever Markdown-authored content meets systems that expect HTML.

Mini-story: Elise is a 33-year-old technical writer who writes all documentation in Markdown. Her company recently migrated from a Markdown-rendering documentation platform to a custom CMS that only accepts HTML. She had 80 articles written in Markdown. Rather than manually converting each one, she used the ToolHQ Markdown to HTML converter to process each article: paste Markdown, copy the HTML output, paste it into the CMS. The live preview let her verify the conversion looked correct before pasting. Each article took under two minutes.

Common situations where Markdown to HTML conversion is needed:

• Converting Markdown blog posts for pasting into a WordPress or Webflow editor
• Extracting HTML from Markdown documentation files for embedding in web pages
• Converting Markdown-formatted API documentation to HTML for a developer portal
• Turning Markdown notes into HTML email templates
• Preparing Markdown-authored content for a platform that only accepts HTML input

Convert Markdown to HTML at ToolHQ

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How to convert Markdown to HTML

1. Open ToolHQ's Markdown to HTML converter in your browser.
2. Paste your Markdown text into the left panel.
3. See the live preview in the right panel -- this shows exactly how the converted HTML will render.
4. Copy the HTML output from the HTML output panel below (or toggle to see the raw HTML).
5. Paste the HTML into your destination: CMS editor, email builder, web page, or any HTML-accepting system.

The converter handles standard Markdown plus GitHub Flavored Markdown extensions including tables, fenced code blocks with language syntax highlighting, task lists, and strikethrough text.

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Markdown syntax quick reference

The table below shows common Markdown syntax on the left and the HTML it produces on the right. Use it as a reference when writing or checking your Markdown before converting.

Markdown syntax	HTML output
# Heading 1	<h1>Heading 1</h1>
## Heading 2	<h2>Heading 2</h2>
### Heading 3	<h3>Heading 3</h3>
**bold text**	<strong>bold text</strong>
*italic text*	<em>italic text</em>
[link text](https://example.com)	<a href="https://example.com">link text</a>
	<img src="image.jpg" alt="alt text">
`inline code`	<code>inline code</code>
> blockquote text	<blockquote><p>blockquote text</p></blockquote>
- Item one (unordered list)	<ul><li>Item one</li></ul>
1. Item one (ordered list)	<ol><li>Item one</li></ol>
--- (horizontal rule)	<hr>
```code block``` (fenced)	<pre><code>code block</code></pre>
~~strikethrough~~ (GFM)	<del>strikethrough</del>
- [ ] Task (GFM task list)	<li><input type="checkbox"> Task</li>

Tables (GFM):

| Column 1 | Column 2 |
| -------- | -------- |
| Cell 1 | Cell 2 |

Converts to a full <table> with <thead> and <tbody>.

Headings: # H1, ## H2, ### H3 -- converts to <h1>, <h2>, <h3>

Bold and italic: **bold** and *italic* -- converts to <strong> and <em>

Links: [text](url) -- converts to <a href="url">text</a>

Images: ![alt text](url) -- converts to <img src="url" alt="alt text">

Lists: Unordered (- item) and ordered (1. item) -- converts to <ul><li> and <ol><li>

Code: Inline `code` converts to <code>. Fenced blocks (triple backtick with language name) convert to <pre><code class="language-xyz">.

Mini-story: Victor, a 38-year-old documentation engineer, was building a developer documentation site. The API reference was written entirely in Markdown by the engineering team. He used the ToolHQ converter to preview how the Markdown tables (API parameters) and fenced code blocks (example requests) would render as HTML before pushing to production. He caught two tables that had misaligned pipe characters (|) that would have broken the table rendering, fixed them in the Markdown source, and verified the fix in the preview -- all without writing a single line of code or running a build process.

For formatting raw HTML output from the converter, use ToolHQ's HTML formatter. For counting words in your Markdown content before converting, use ToolHQ's word counter. Browse all developer tools in the ToolHQ developer category.

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Frequently asked questions

Is my content sent to a server?

No. ToolHQ's Markdown to HTML converter processes your text entirely in your browser. Your content never leaves your device and is never sent to any server.

What is GitHub Flavored Markdown (GFM)?

GFM is a Markdown variant used by GitHub that adds tables, task lists (- [ ] and - [x]), strikethrough (text), autolinks (bare URLs), and fenced code blocks with language names. ToolHQ's converter supports GFM extensions.

Can I convert HTML back to Markdown?

The converter works in one direction only: Markdown to HTML. Converting HTML back to Markdown requires a separate tool (sometimes called an "HTML to Markdown" converter).

Will the converter handle my custom Markdown extensions?

The tool handles standard Markdown and GFM. Custom extensions specific to particular platforms (Hugo shortcodes, Jinja templates, MDX) are not processed as HTML -- they pass through as plain text.

What happens to YAML front matter in my Markdown file?

Markdown files from static site generators like Jekyll, Hugo, or Gatsby often start with a YAML front matter block enclosed in triple-dashes:

---
title: My Article
date: 2024-01-01
---

The converter treats this as plain text (not Markdown syntax), so it will appear in the HTML output rather than being stripped. If you need clean HTML without the front matter, delete the --- block from the Markdown before converting.

Can I convert a large Markdown document?

Yes. The tool works in your browser with no file size limit. Very large documents may take a moment to render the live preview, but the conversion is not size-restricted.

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The short version

ToolHQ's Markdown to HTML converter turns Markdown into clean HTML instantly, with a live preview so you can see the rendered output before you copy it. Your content never leaves your browser.

Whether you're migrating content to a new CMS, preparing documentation HTML, or just need a quick conversion, this tool handles it in seconds.

For formatting the HTML output, use ToolHQ's HTML formatter. For word count before converting, use ToolHQ's word counter. Browse all developer tools at the ToolHQ developer category.

Convert Markdown to HTML now

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