HTML to AsciiDoc Converter

About HTML to AsciiDoc Converter

Convert HTML documents to AsciiDoc markup that works seamlessly with Asciidoctor, Antora, and other AsciiDoc-based documentation systems. This tool is ideal when you need to migrate existing HTML docs, knowledge base articles, or blog posts into a Git-friendly, text-based format.

Key Features

• Heading conversion: Map <h1>–<h6> to AsciiDoc levels (=, ==, ===, etc.).
• Inline formatting: Preserve bold (*text*), italic (_text_), and inline code (`code`).
• Lists & nesting: Convert HTML ordered/ unordered lists to AsciiDoc bullet and numbered lists.
• Tables: Generate |===-style AsciiDoc tables with optional header attributes.
• Code blocks: Turn <pre><code> blocks into fenced source blocks with optional language hints.
• Links & images: Output proper link:url[text] and image::path[alt] syntax.
• Blockquotes: Convert HTML blockquotes into AsciiDoc quote blocks.

How to Convert HTML to AsciiDoc

1. Paste or upload HTML: Insert your HTML snippet or upload a full .html page.
2. Configure options: Decide whether to include the document = Title and table attributes.
3. Review AsciiDoc: Check headings, lists, code, and tables in the output panel.
4. Copy or download: Copy the AsciiDoc markup into your docs repo or download it as an .adoc file.
5. Render with Asciidoctor: Use Asciidoctor/Antora to build HTML, PDF, or site output from the converted file.

Examples

Example 1: Heading and paragraph

HTML input:

<h2>Getting Started</h2>
<p>AsciiDoc is a lightweight markup language.</p>

AsciiDoc output:

== Getting Started

AsciiDoc is a lightweight markup language.

Example 2: HTML table to AsciiDoc table

The tool converts HTML tables into:

|===
| Column 1 | Column 2

| A        | B
| C        | D
|===

When to Use HTML to AsciiDoc

• Documentation migration: Move existing HTML documentation into version-controlled AsciiDoc.
• Antora/Asciidoctor projects: Prepare content for docs sites built with Asciidoctor or Antora.
• Book and long-form content: Convert HTML books or guides into AsciiDoc manuscripts.
• Static site workflows: Replace HTML fragments with AsciiDoc for Git-based static site generators.

FAQ

Does the converter handle complex nested layouts?

The focus is on common documentation structures: headings, paragraphs, lists, tables, code, links, and images. Very complex layout-specific HTML may need manual cleanup after conversion.

Is the output compatible with Asciidoctor?

Yes. The generated AsciiDoc is designed to work well with Asciidoctor and downstream tools like Antora or Asciidoctor PDF.

Can I customize attributes (roles, IDs, etc.)?

The converter generates standard AsciiDoc. If you need advanced attributes or roles, you can add them manually after export in your editor.

Is my HTML sent to a server?

No. HTML to AsciiDoc conversion happens entirely in your browser. Your documentation content is never uploaded, which is important for private or internal docs.

Privacy & Security

All processing is client-side only. No HTML or AsciiDoc is stored or logged, so you can safely convert internal documentation and proprietary content.