OPML to Reveal.js Converter
Processing entirely on your device — large files may take a moment.
Outline Processor Markup and Reveal.js HTML Slides 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 Markdown or Word content into a Reveal.js deck when you need a talk that runs from any browser — no PowerPoint, no install.
Because the whole conversion happens on your device, it is instant, unlimited and genuinely private — no accounts, no watermarks, no files on anyone's server. Multiple files are converted in one go.
How OPML compares to Reveal.js
| OPML | Reveal.js | |
|---|---|---|
| Structure | XML <outline> tree | Standalone HTML + CDN runtime |
| Best for | Subscriptions lists and mind maps | Tech talks, courses, demos |
How to convert OPML to Reveal.js
- 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 Reveal.js — 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 Reveal.js format
Reveal.js turns a single HTML file into a full presentation: keyboard-navigable slides, transitions, speaker notes, fragments and even built-in PDF export. The converted file references the Reveal.js runtime from a CDN, so it runs in any browser — nothing to install, nothing to upload.
Headings become slide titles and sections become decks of slides; lists render as fragments you can step through. It is the fastest way from written content to a talk that works on any screen — and the file stays yours, editable in any text editor.
+Strengths
- ✓One file, runs in any browser
- ✓Speaker notes, fragments and PDF export built in
- ✓Editable as plain HTML afterwards
!Limitations
- −Needs internet for the CDN runtime
- −Design is template-driven, less bespoke than PPTX
- −Complex diagrams need hand-written HTML
Why convert OPML to Reveal.js?
Think of it as moving your file to the container that fits the job. Hierarchies only — no rich text per node Reveal.js works differently: One file, runs in any browser 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 Reveal.js 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 Reveal.js?
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.
Does the conversion work offline?
Yes. Once the page has loaded, the conversion itself runs entirely inside your browser — you can even disconnect and keep converting. No file ever touches a server.
Will the layout of my OPML file be preserved exactly?
This converter renders your OPML content into Reveal.js 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.