OPML to AsciiDoc Converter
Processing entirely on your device — large files may take a moment.
Outline Processor Markup and AsciiDoc Document exist for different jobs: OPML is the outline-exchange XML: nested <outline> elements that carry subscription lists (podcast apps, RSS readers) and mind-map exports from Workflowy, Dynalist and OmniOutliner. Convert AsciiDoc when docs need to move into Word, Markdown pipelines or HTML sites without losing structure.
This converter runs entirely in your browser using WebAssembly — your files never leave your device, nothing is uploaded, and there are no watermarks, sign-ups or queues. Drop in several files at once to convert them as a batch.
How OPML compares to AsciiDoc
| OPML | AsciiDoc | |
|---|---|---|
| Structure | XML <outline> tree | Plain-text markup (==, [source], |===) |
| Types / schema | XML, text + attributes | UTF-8 text |
| Compatibility | RSS readers, outliners, Pandoc | Asciidoctor, Git docs, Pandoc |
| Best for | Subscriptions lists and mind maps | Technical books and large doc sets |
How to convert OPML to AsciiDoc
- 1
Select your files
Select your OPML file.
- 2
Convert instantly
The file is first converted to markdown (an interchange format that keeps headings, lists and paragraphs), then rebuilt into the target format.
- 3
Download results
Download the AsciiDoc — structure preserved, heavy layout simplified.
About the OPML format
OPML (Outline Processor Markup) is XML for hierarchies: nested <outline> elements, each with text and optional attributes. It is the silent standard behind podcast and RSS subscription lists — every "export subscriptions" button produces one — and the interchange format for outliners like Workflowy, Dynalist and OmniOutliner.
An outline is already half a document: Pandoc turns OPML hierarchies into Markdown headings, Word outlines or HTML pages with the nesting preserved, and can write OPML back out so a bulleted plan becomes an importable tree in your outliner of choice.
+Strengths
- ✓Universal outline exchange between outliners
- ✓The RSS/podcast subscription standard
- ✓Trivially parseable XML
!Limitations
- −Hierarchies only — no rich text per node
- −Attribute conventions vary between apps
- −Rarely rendered directly for humans
About the AsciiDoc format
AsciiDoc is what happens when lightweight markup grows up. Where Markdown stops at bold and lists, AsciiDoc carries title pages, multi-level sections, callouts, admonitions, xrefs and real table syntax — enough to author entire technical books without leaving plain text. The Git and Linux-kernel documentation ecosystems standardized on it, rendered through Asciidoctor.
The format's weakness is tooling gravity: AsciiDoc converters outside the Asciidoctor/Ruby world are scarce, which is exactly where Pandoc fills the gap. Converting to Word hands manuscripts to editors who live in Office; converting to Markdown feeds modern docs sites. The section structure and tables survive the trip.
+Strengths
- ✓Book-grade structure: sections, callouts, admonitions, xrefs
- ✓Powering Git and Linux kernel docs — battle-tested at scale
- ✓Stays readable as plain text
!Limitations
- −Heavier syntax than Markdown for casual notes
- −Converter ecosystem concentrated in Asciidoctor tooling
- −Multiple dialects (legacy asciidoc vs asciidoctor)
Why convert OPML to AsciiDoc?
Think of it as moving your file to the container that fits the job. Hierarchies only — no rich text per node AsciiDoc works differently: Book-grade structure: sections, callouts, admonitions, xrefs If any of that sounds like your task, run the conversion — it takes seconds and nothing leaves your device.
Frequently asked questions
Is this OPML to AsciiDoc converter really free?
Yes — completely free, with no sign-up, no watermark and no daily conversion limits. The site is supported by advertising.
Are my files uploaded to a server?
No. The conversion runs entirely inside your browser using WebAssembly, so your files never leave your device — that is what makes it instant and private.
Does it work on Windows, Mac, iPhone and Android?
Yes. Anything with a modern browser works: Windows, macOS, Linux, Android and iOS. No software installation is required.
Is there a file size limit for OPML to AsciiDoc?
The only limit is your device's memory, since nothing is uploaded. Files up to a few hundred megabytes work fine on a modern desktop browser; very large files simply take a little longer.
Will the layout of my OPML file be preserved exactly?
This converter renders your OPML content into AsciiDoc with pages, proportions and images kept as close to the original as the target format allows. Use the preview before downloading to confirm it looks the way you expect.
Can I edit the AsciiDoc result afterwards?
That depends on the target: AsciiDoc is designed for what it does, and this converter reproduces its content faithfully rather than inventing editable structure. For heavy re-editing, work from a format built for editing and export the final version here.