Markdown ↔ HTML Converter

About Markdown ↔ HTML Converter

This converter handles both directions on a single page. Switch to Markdown to HTML to turn lightweight Markdown into markup you can paste into a web page, a CMS, or an email template. Switch to HTML to Markdown to turn existing HTML into readable Markdown for a README, a wiki, or a documentation site. Everything runs in your browser, so your content is never uploaded.

Supported Syntax

• Headings — # to ###### and underline-style headings.
• Emphasis — bold, italic and strikethrough, plus inline code and fenced code blocks with a language class.
• Lists — ordered, unordered, nested lists and [ ] / [x] task items.
• Links and images — inline links, optional titles and autolinks. javascript: URLs are neutralised.
• Blockquotes, rules and tables — including column alignment with colons in the separator row.

How to Use

1. Pick a direction from the Direction list.
2. Paste your content, upload a file, or load the sample.
3. Click the convert button or press Ctrl+Enter.
4. In Markdown to HTML mode, use Preview to see the rendered result, then copy or download it.
5. Use Swap to feed the output back in and check a round trip.

What Is Markdown?

Markdown is a plain-text writing format created to be easy to read and easy to write. Instead of typing tags, you mark up text with simple symbols: a pound sign for a heading, asterisks for emphasis, a dash for a list item. A converter then turns that text into HTML that a browser can display. Because the source stays readable on its own, Markdown has become the default format for README files, developer documentation, static site generators, issue trackers, note-taking apps and many content management systems.

Why Convert Between Markdown and HTML?

Writers prefer Markdown, but browsers, email clients and most publishing platforms ultimately need HTML. Converting Markdown to HTML lets you draft quickly and then paste finished markup into a template, a newsletter or a CMS field that only accepts HTML. The reverse direction is just as useful. When you inherit a web page, a help-centre article or an exported blog post, converting its HTML to Markdown gives you clean, portable text that is easy to edit, review in version control and move to a new platform without carrying along layout markup.

Real-World Scenarios

• Turning a README or changelog written in Markdown into HTML for a product website or release page.
• Preparing blog posts and documentation drafted in Markdown for a CMS that expects HTML.
• Migrating old HTML articles or wiki pages into a Markdown-based docs site or static site generator.
• Cleaning copied web content into plain Markdown notes for a knowledge base.
• Checking how a Markdown table, task list or code block will render before publishing it.

Tips for Better Results

• Leave a blank line before and after headings, lists, tables and code blocks so they are recognised as separate blocks.
• Indent nested list items by at least two spaces so they attach to the right parent item.
• Add a language name after the opening code fence, such as js, so the output carries a language-js class that syntax highlighters can use.
• When converting HTML, remove navigation, ads and scripts first so the Markdown contains only the content you want.
• Review links and image paths after converting a page, because relative URLs may need to be updated for the new location.

Good to Know

Raw HTML typed inside Markdown is escaped rather than passed through, so the generated HTML contains only elements produced from Markdown syntax. When converting HTML to Markdown, elements that have no Markdown equivalent, such as forms, inline styles and scripts, are dropped and only their text content is kept. The preview is rendered in a sandboxed frame without script execution.