Markdown to HTML & HTML to Markdown Converter
Convert Markdown to HTML and HTML to Markdown. Transform between formats for web publishing, documentation, and content editing. Bidirectional conversion tool.
Markdown Input
HTML Output
Output will appear here after conversion
About Markdown to HTML & HTML to Markdown Converter
A bidirectional Markdown and HTML converter that seamlessly transforms between both formats. Convert Markdown to clean, semantic HTML for web publishing, or convert HTML back to Markdown for easy editing and version control. This versatile tool handles both HTML to Markdown and Markdown to HTML conversions, making it essential for content creators working across different platforms and formats.
Why use a Markdown to HTML & HTML to Markdown Converter?
This converter streamlines workflows by enabling quick conversion between Markdown and HTML formats. Whether you need to publish Markdown content to the web (Markdown to HTML) or extract content from HTML sources for editing (HTML to Markdown), this tool saves time and ensures accurate format transformation. Perfect for maintaining documentation in multiple formats and migrating content between systems.
Who is it for?
Essential for developers converting between README files and web documentation, content managers migrating HTML content to Markdown-based systems, bloggers switching between platforms, technical writers managing documentation in both formats, and anyone who needs reliable HTML to Markdown or Markdown to HTML conversion for their workflow.
How to use the tool
Select your conversion direction: Markdown to HTML or HTML to Markdown
Paste your source content (Markdown or HTML) into the input field
Click Convert to transform between formats (nothing updates until you click it)
Review and copy the converted output
In Markdown to HTML mode, check the rendered preview next to the raw HTML output; in HTML to Markdown mode, set the heading style, bullet marker and GFM options first
Frequently Asked Questions
How do I convert Markdown to HTML?
Paste your Markdown into the input area and click Convert. The tool shows the raw HTML output and a rendered preview. Supports CommonMark + GFM (GitHub Flavored Markdown) extensions: tables, task lists, fenced code blocks, strikethrough. Copy or download the HTML output for use in blogs, CMSes, or static sites. The HTML output is the converter's raw result; only the preview is sanitized, so sanitize the HTML yourself if it will include untrusted content. Conversion runs entirely in your browser — your Markdown never leaves the device.
What is Markdown?
Markdown is a lightweight markup language designed to be easy to write and read in plain text. Created by John Gruber and Aaron Swartz in 2004. Syntax: `**bold**`, `*italic*`, `# heading`, `- list item`, `[link](url)`, ``. CommonMark (2014) is the modern standardized version. GitHub Flavored Markdown (GFM) extends it with tables, task lists, strikethrough, autolinking. Used in: GitHub READMEs, blog posts, documentation (Read the Docs, GitBook), static sites (Hugo, Jekyll, Next.js).
Is my Markdown sent to a server?
No — conversion runs entirely in your browser (the marked library for Markdown to HTML and Turndown for HTML to Markdown). Your content never reaches a server, never gets logged. Verify in DevTools' Network tab: the only requests are for the tool's own code (plus any images in the rendered preview, which your browser loads from their URLs). Safe for sensitive drafts.
What Markdown features does this support?
Standard CommonMark + GFM extensions. Headings (`#` through `######`), bold/italic, ordered and unordered lists, links, images, blockquotes, code blocks (fenced with backticks), inline code, horizontal rules. GFM extensions: tables (with alignment), task lists (`- [x]` checkboxes), strikethrough (`~~text~~`), autolinks. Not supported: footnotes, emoji shortcodes (`:smile:`), math (LaTeX-style `$...$`) and diagrams (Mermaid).
What's the difference between CommonMark and GitHub Flavored Markdown?
CommonMark (2014) is the formal Markdown specification — standardised syntax for the original features. GitHub Flavored Markdown (GFM) extends CommonMark with: tables, task lists, strikethrough, autolinks. Most modern Markdown processors implement CommonMark + GFM together; the result is the de facto Markdown standard. This tool's Markdown to HTML direction supports both.
How do I add syntax highlighting to code blocks?
Fenced code blocks with a language identifier: ` ```javascript ` then your code then ` ``` `. The HTML output includes a `<code class='language-javascript'>` element; the converter itself does not colour the code. For client-side syntax highlighting in your final page, layer a highlighter library on top. The Markdown processor identifies the language; the highlighter applies colour.
Can I include raw HTML inside Markdown?
Yes — CommonMark allows raw HTML inline and as blocks. `<span style='color: red'>red</span>` inside Markdown stays in the HTML output. Useful when Markdown's vocabulary is insufficient: custom layouts, specific styling, embedded media. Caveats: (1) Don't mix Markdown syntax inside HTML (Markdown won't process). (2) For untrusted input, raw HTML opens XSS vectors: this tool's preview is sanitized, but the raw HTML output is not, so run it through a sanitizer before using it on a page. (3) Some static-site builders disable raw HTML for security; check your tool.
How does the HTML to Markdown direction work?
This tool does it too. Switch to 'HTML → Markdown', paste HTML and click Convert. Options: heading style (ATX `#` or Setext), bullet marker (`-`, `*` or `+`) and GFM support (tables, strikethrough, task lists). Code blocks come out fenced, emphasis as `_italic_` and `**bold**`. Use case: importing content from a CMS or copy-pasting from a website to a Markdown blog. Imperfect: HTML supports many constructs Markdown doesn't (complex tables, custom styling, embedded JS) — round-trip conversion loses these. For round-trip Markdown editing, keep the source in Markdown and convert to HTML only at render time.
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