AsciiDoc to HTML Converter - Technical Documentation Tool

Convert AsciiDoc to HTML with admonitions, code blocks, tables, and cross-references. Perfect for technical docs, O'Reilly books, API documentation.

Note: First conversion initializes Pandoc WebAssembly (~55MB). Subsequent conversions are instant.

Drop AsciiDoc file here or click to browse

Accepts .adoc, .asciidoc, .asc, .txt files

AsciiDoc Input

Enter AsciiDoc to see preview

Include HTML wrapper

Common AsciiDoc Syntax

AsciiDoc	Description	Example Output
`= Document Title`	Document title (level 0)	H1 heading
`== Section`	Section heading (level 1)	H2 heading
`=== Subsection`	Subsection heading (level 2)	H3 heading
`bold`	Bold text	bold
`_italic_`	Italic text	italic
`code`	Inline code	`code`
`NOTE: text`	Note admonition	Blue info box
`TIP: text`	Tip admonition	Green tip box
`WARNING: text`	Warning admonition	Yellow warning box
`CAUTION: text`	Caution admonition	Red caution box
`IMPORTANT: text`	Important admonition	Orange important box
`[source,java] ---- code ----`	Code block with language	Syntax-highlighted code
`\|=== \|A \|B \|===`	Table	HTML table
`<<anchor,label>>`	Cross-reference	Internal link

AsciiDoc Features

Block Types

==== - Example block
**** - Sidebar block
.... - Literal block
____ - Quote block
---- - Listing/code block

Document Attributes

:author: - Document author
:email: - Author email
:toc: - Table of contents
:sectnums: - Number sections
:source-highlighter: - Code syntax

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Frequently Asked Questions

AsciiDoc is a lightweight markup language designed for writing technical documentation, books, and articles. Originally created for the Linux Documentation Project, it's widely used by O'Reilly Media, technical writers, and developers. It offers more semantic elements than Markdown while remaining human-readable.

AsciiDoc provides richer semantic markup including admonitions (NOTE, TIP, WARNING), sidebars, example blocks, and better table support. It's the preferred format for technical books and complex documentation where Markdown's simplicity becomes limiting.

Admonitions are special callout blocks for highlighting important information: NOTE (general information), TIP (helpful suggestion), IMPORTANT (critical detail), CAUTION (proceed carefully), WARNING (potential danger). These render as styled boxes with icons in HTML.

AsciiDoc supports both inline code (`code`) and fenced code blocks with syntax highlighting. You can specify the language (```[source,java]```) and include line numbers or callouts. The converter preserves these attributes for proper HTML rendering.

Include directives (```include::filename.adoc[]```) cannot be resolved in browser-based conversion since file system access is restricted. You'll need to manually merge included files or preprocess your document before conversion.

Yes. This tool handles O'Reilly's AsciiDoc conventions including chapters, sections, cross-references, sidebars, and examples. However, complex custom macros or publishing-specific attributes may require manual adjustment.

AsciiDoc's powerful table syntax (cell spanning, column alignment, header/footer rows) converts to semantic HTML tables. Both simple pipe-delimited and CSV-style tables are supported. Complex nested tables may need verification.

Yes. Internal cross-references using ```<>``` syntax are converted to HTML anchor links. However, inter-document references will need adjustment if linking between separate files.

Absolutely. All conversion happens locally in your browser using Pandoc WebAssembly. Your AsciiDoc documents are never uploaded to any server and remain completely private on your device.

Standard attributes (```author```, ```title```, ```toc```) are processed. Custom attributes and conditional directives may have limited support in browser-based conversion. Test your specific document to verify compatibility.

Common AsciiDoc Syntax

AsciiDoc Features

Block Types

Document Attributes

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