Both HTML and Markdown produce content that displays in a browser, but they exist at completely different levels of abstraction. Understanding where each belongs in your workflow saves time and prevents the frustration of using the wrong tool for the job. Write your Markdown and preview the rendered HTML side-by-side using our Markdown editor online.
What Is Markdown?
Markdown is a lightweight plain-text formatting syntax created by John Gruber in 2004. It was designed to be readable as plain text and to convert cleanly to HTML. A Markdown file uses simple punctuation to express structure:
# Heading 1
## Heading 2
**Bold text**
*Italic text*
- List item one
- List item two
[Link text](https://example.com)A Markdown processor converts this to valid HTML. The result is identical to writing the HTML by hand, but the source is far more readable and faster to write.
What HTML Does That Markdown Cannot
Markdown is intentionally limited. It handles the common document structures — headings, paragraphs, lists, links, images, code blocks, blockquotes — and nothing beyond that. For anything more complex, you must either drop into raw HTML within the Markdown file or abandon Markdown entirely. HTML handles:
- Custom attributes (class names, IDs, data attributes)
- Tables with colspan and rowspan
- Forms, input fields, buttons
- Custom layouts with divs and CSS classes
- Embedded video, audio, iframes
- ARIA accessibility attributes
- Schema.org structured data markup
When to Use Markdown
Markdown is the right choice when:
- You are writing documentation (README files, wikis, developer docs). GitHub, GitLab, Notion, Confluence, and almost every developer platform renders Markdown natively.
- You are writing blog posts or articles in a CMS that supports Markdown (Ghost, Statamic, most headless CMSes).
- You want to write fast without lifting your hands from the keyboard. Markdown's syntax is muscle memory for most developers.
- The content will be stored in version control. Plain text Markdown diffs are human-readable; HTML diffs are noisy.
When to Use HTML
HTML is the right choice when:
- You need precise control over layout and structure — custom classes, IDs, ARIA roles, data attributes.
- You are building web pages, templates, or email layouts where every element matters.
- You need forms, interactive components, or any element Markdown cannot express.
- You are working in an environment that renders HTML directly — a CMS visual editor, an email builder, or a web application template.
Converting Between Them
Moving between HTML and Markdown is a common task. When you have existing HTML content that needs to go into a Markdown-based system, use an HTML to Markdown converter to do the conversion automatically rather than rewriting by hand.
The reverse — Markdown to HTML — is handled by Markdown processors in every major programming language (marked.js in JavaScript, Python-Markdown, kramdown in Ruby, etc.). Most modern CMSes do this conversion server-side before storing or rendering content.
The Practical Answer
Use Markdown for content you write, HTML for pages you build. Many modern workflows combine both: write article body content in Markdown, but control page templates, navigation, and structural components in HTML. This separation keeps the writing experience clean while giving full control over the page structure.
If you are ever unsure which format a platform expects, check whether it renders **bold** as bold text or shows the asterisks literally. That tells you everything.