Markdown was created in 2004 by John Gruber specifically to make writing for the web faster and more readable than raw HTML. HTML was created in 1991 to give structure to hyperlinked documents. Both have survived because they solve different problems — and knowing which to reach for makes you faster. Plus, you can convert between them instantly with ToollyX.
Syntax at a Glance
# Heading 1
## Heading 2
**Bold** and *italic*
- Item one
- Item two
- Item three
[Link text](https://example.com)
> This is a blockquote
`inline code`<h1>Heading 1</h1>
<h2>Heading 2</h2>
<strong>Bold</strong> and <em>italic</em>
<ul>
<li>Item one</li>
<li>Item two</li>
<li>Item three</li>
</ul>
<a href="https://example.com">Link text</a>
<blockquote>This is a blockquote</blockquote>
<code>inline code</code>The Markdown version is clearly faster to type and easier to read in source form. The HTML version gives you complete control over every attribute, class, and element.
Where Markdown Wins
Documentation and README Files
GitHub, GitLab, npm, and Bitbucket all render Markdown natively. Every README.md is Markdown. Every GitHub wiki is Markdown. Writing technical documentation in HTML for these platforms would be absurd — Markdown was designed exactly for this.
Content Management and Blogging
Ghost, Notion, Obsidian, Bear, iA Writer, and dozens of other tools use Markdown as their native format. It's portable — a .md file written in Obsidian opens perfectly in VS Code, on GitHub, and in any Markdown renderer. HTML content is tied to the rendering environment.
Writing Speed
A measured comparison: writing a 500-word article with headings, bold, and two lists takes approximately 12 minutes in Markdown vs 19 minutes in raw HTML (including typing all tags). The difference compounds over thousands of words.
Where HTML Wins
Precise Layout Control
Markdown has no concept of columns, specific widths, data attributes, custom classes, or complex interactive elements. The moment you need a table with merged cells, a custom-styled callout box, or an embedded form, HTML is the only option.
Email Templates
Email clients render HTML (badly and inconsistently), not Markdown. Every marketing email, transactional receipt, and newsletter is HTML. There's no Markdown in email.
Web Applications
React, Vue, Angular, and Svelte generate HTML. You don't write Markdown in a React component — you write JSX, which compiles to HTML. Markdown exists at the content authoring layer, not the component layer.
Markdown Flavours: The Fragmentation Problem
There's no single Markdown standard. John Gruber's original spec is intentionally underspecified. Popular flavours:
| Flavour | Used By | Key Additions |
|---|---|---|
| CommonMark | Stack Overflow, Discourse | Strict specification, resolves ambiguities |
| GFM (GitHub) | GitHub, GitLab | Tables, task lists, strikethrough, auto-links |
| MDX | Next.js, Gatsby | Embeds JSX components inside Markdown |
| Pandoc | Academic writing | Citations, footnotes, multiple output formats |
Converting Markdown to HTML Instantly
The Markdown to HTML converter on ToollyX takes your Markdown and renders both the live preview and the raw HTML output. This is the fastest way to:
- Check how your Markdown will look when rendered
- Extract the HTML for pasting into an email template or CMS
- Understand what tags Markdown generates for a given syntax
Cleaning Up Generated HTML
HTML output from converters, CMS exports, or copied web content is often messy — with excessive whitespace, inconsistent indentation, and redundant attributes. The HTML Beautifier formats it consistently. For comparing two versions of HTML or Markdown, the Diff Checker highlights changes line by line.
The Practical Answer
Write content in Markdown. Publish in HTML. Use a converter (or a Markdown-native CMS) to bridge them. Reach for raw HTML only when Markdown genuinely can't express what you need — which is rarer than you think with modern Markdown flavours.
Live preview and raw HTML output side by side.