Is AsciiDoc the same as Markdown?

No. AsciiDoc is a more feature-rich format designed for long-form technical documents: it has native support for footnotes, cross-references, includes, sidebars, and output to multiple formats. Markdown is simpler and better suited for short-form web content.

Does the converter support Asciidoctor extensions?

No — client-side conversion handles core AsciiDoc syntax. Asciidoctor extensions (diagram, pdf) run server-side and are not supported here. Use the Asciidoctor CLI for those.

Can I convert the other way — HTML to AsciiDoc?

This tool converts AsciiDoc to HTML only. For the reverse direction, Pandoc supports HTML-to-AsciiDoc conversion via command line.

AsciiDoc → HTML | DevTools Surf

DevTools Surf

Example: AsciiDoc → HTML

A worked example, rendered from real sample data. Sign in to run the tool on your own input.

Input

= Document Title

== Section One

*Bold text* and _italic text_.
+Monospaced text+ or `code`.

link:https://example.com[Click here]

Output

<p><h1>Document Title</h1></p><p><h2>Section One</h2></p><p><strong>Bold text</strong> and <em>italic text</em>.
<code>Monospaced text</code> or `code`.</p><p><a href="https://example.com">Click here</a></p>

About AsciiDoc → HTML

AsciiDoc → HTML preview - Converters tool

Convert AsciiDoc markup to HTML with structure preservation. Part of the DevTools Surf developer suite. Browse more tools in the Converters collection.

Use Cases

Convert AsciiDoc technical documentation to HTML for web publishing
Preview AsciiDoc files without installing Asciidoctor locally
Extract HTML from AsciiDoc book chapters for single-page embedding
Verify AsciiDoc markup renders correctly before committing to a docs repo

Tips

Include the ':toc:' attribute at the top of the document to auto-generate a table of contents in the HTML output
Use [source,python] blocks with syntax highlighting attribute to get code-fenced output with language hints
AsciiDoc's include directives are not executed client-side — inline all content before pasting for correct conversion

Fun Facts

AsciiDoc was created by Stuart Rackham in 2002, predating Markdown by two years. It was designed from the start for technical book-length documents, not blog posts.
O'Reilly Media adopted AsciiDoc as its primary authoring format for technical books in the early 2010s. Many well-known programming books are written in AsciiDoc and converted to PDF/EPUB via Asciidoctor.
Asciidoctor, the modern Ruby-based AsciiDoc processor, processes documents at over 1,000 pages per second — fast enough for large documentation sets where Markdown tools sometimes struggle.

FAQ

Is AsciiDoc the same as Markdown?: No. AsciiDoc is a more feature-rich format designed for long-form technical documents: it has native support for footnotes, cross-references, includes, sidebars, and output to multiple formats. Markdown is simpler and better suited for short-form web content.
Does the converter support Asciidoctor extensions?: No — client-side conversion handles core AsciiDoc syntax. Asciidoctor extensions (diagram, pdf) run server-side and are not supported here. Use the Asciidoctor CLI for those.
Can I convert the other way — HTML to AsciiDoc?: This tool converts AsciiDoc to HTML only. For the reverse direction, Pandoc supports HTML-to-AsciiDoc conversion via command line.

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