Markdown to HTML Editor

Live Markdown to HTML converter and editor.

Markdown Previewer

71 words476 chars31 lines

Markdown Source

Preview

Hello, Markdown!

This is a bold statement, and this is italic.

Code Example

const greet = (name) => Hello, ${name}!;
console.log(greet('World'));

Inline code also works.

Lists

Item one
Item two
Item three

First step
Second step
Third step

"Simplicity is the soul of efficiency." — Austin Freeman

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~~Strikethrough~~ and bold with bold italic.

How to Use

Write or paste Markdown

Enter Markdown in the editor and see both the rendered preview and raw HTML output.

Review the generated HTML

Inspect the HTML source code generated from your Markdown formatting.

Copy the HTML output

Copy the clean HTML for use in websites, CMS platforms, or email templates.

Learn the Markdown-to-HTML mapping

See exactly which HTML element each Markdown syntax pattern produces.

What is Markdown?

Markdown is a lightweight markup language that you can use to add formatting elements to plaintext text documents. Created by John Gruber in 2004, Markdown makes it easy to write formatted text without using complex HTML tags.

Real-World Examples & Use Cases

Static Site Generator Content Pipelines

Static site generators (Jekyll, Hugo, Gatsby, Next.js) convert Markdown files (.md) to HTML pages as part of their build process. Developers and content authors can preview this Markdown-to-HTML conversion to verify their content will render correctly before committing files. This is especially useful for custom shortcodes, frontmatter, and platform-specific Markdown extensions that may render differently than standard CommonMark.

Email Template Development

Many email marketing tools and transactional email services accept HTML-formatted email bodies. Content writers comfortable with Markdown can write emails in plain Markdown and convert to HTML for pasting into email builders. The Markdown-to-HTML output provides clean, semantic HTML that email clients can render consistently. Code blocks and formatting hierarchy translate to readable HTML-formatted emails without needing to hand-code HTML tags.

CMS and Blog Platform Content Entry

Some content management systems (older WordPress setups, custom CMS tools, Contentful, Strapi) have rich text editors that accept HTML input but don't process Markdown directly. Content editors who prefer writing in Markdown can write their posts in Markdown, convert to HTML, and paste the HTML into the CMS editor. This preserves heading hierarchy, list formatting, code blocks, and links without requiring the author to write HTML tags manually.

Learning HTML from Markdown

Markdown is often used as an introduction to web content formatting because it's simpler than HTML. A Markdown-to-HTML converter makes the relationship between Markdown syntax and HTML tags immediately visible: students writing # Heading level 1 see it become <h1>Heading level 1</h1> in real time. This bidirectional understanding helps beginners grasp both Markdown (for writing) and HTML (for understanding what Markdown produces), forming a bridge between casual content writing and front-end web development.

How It Works

Markdown to HTML Conversion Mapping: Headings: # H1 → <h1>H1</h1> ## H2 → <h2>H2</h2> ### H3 → <h3>H3</h3> (up to h6) Emphasis: **text** → <strong>text</strong> *text* → <em>text</em> ~~text~~ → <del>text</del> (GFM) Lists: - item → <ul><li>item</li></ul> 1. item → <ol><li>item</li></ol> nested → nested <ul> or <ol> inside <li> Links and Images: [text](url) → <a href="url">text</a> ![alt](src) → <img src="src" alt="alt"> Code: `code` → <code>code</code> ```lang block ``` → <pre><code class="language-lang">block</code></pre> Blockquotes: > text → <blockquote><p>text</p></blockquote> Paragraphs: Blank-line separated text → <p>text</p> Horizontal rules: --- → <hr> Tables (GFM): | A | B | → <table><thead><tr><th>A</th><th>B</th></tr></thead> |---|---| <tbody>...</tbody></table>

Frequently Asked Questions

Why would I want the HTML output instead of just the rendered preview?▼

The HTML output is useful when you need to embed content in a system that doesn't process Markdown natively. CMS platforms with HTML editors, email marketing tools, legacy website templates, and Rich Text Format documents all accept HTML but not Markdown. The HTML output is also useful for learning — seeing exactly which HTML tags Markdown produces helps web developers understand the semantic HTML structure behind common Markdown patterns.

Is the generated HTML safe to embed in a webpage?▼

You should sanitize Markdown-generated HTML before embedding it in web pages if the Markdown source comes from user input. Raw Markdown can contain inline HTML tags (h3, span, etc.), and malicious users could embed script tags, event handlers (onclick=), or external resource references in Markdown that becomes unsafe HTML. For user-submitted content, pass the generated HTML through a sanitization library (DOMPurify for JavaScript) that strips potentially dangerous elements while preserving formatting HTML tags.

What is CommonMark and why does it matter?▼

CommonMark is the standardized specification of Markdown, created because classic Markdown had many ambiguous edge cases that different parsers handled differently. Different websites would render the same Markdown differently — causing confusing inconsistencies. CommonMark (commonmark.org) defines exact rules for every edge case. Most modern Markdown parsers aim to be CommonMark-compliant. When Markdown renders differently between platforms, it's usually because one platform uses a stricter or older implementation.

Can Markdown contain raw HTML?▼

Yes, in most Markdown parsers, raw HTML tags within Markdown are passed through to the HTML output unchanged. This allows you to use HTML elements not supported in Markdown syntax: <table> with rowspan, <details>/<summary> for collapsible sections, <div> for container styling, <iframe> for embeds, or inline <span> for custom styling. However, not all platforms allow raw HTML — GitHub sanitizes inline HTML in README files (removes scripts and iframes), while some CMSes strip all HTML entirely.

How do I convert an entire HTML page to Markdown?▼

Markdown-to-HTML is a one-way conversion for simple content; HTML-to-Markdown is more complex because HTML is superset-rich (tables with span, class attributes, nested divs). Several tools do this: Turndown.js (JavaScript library), html2text (Python library), and Pandoc (command-line universal document converter) are popular options. Pandoc handles the most complex HTML and outputs clean Markdown. For web scraping and content migration, Turndown.js is common because it runs in the browser and handles most common HTML formatting patterns.

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