IPYNB to OPML Converter
Processing entirely on your device — large files may take a moment.
Jupyter Notebook and Outline Processor Markup exist for different jobs: IPYNB is the Jupyter Notebook format: a JSON document mixing markdown cells, code cells, outputs and metadata. It is the default medium of data-science work — every analysis, tutorial and Kaggle kernel lives in one. Convert OPML outlines into Markdown or Word documents, or turn bullet lists back into an importable outline.
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 IPYNB compares to OPML
| IPYNB | OPML | |
|---|---|---|
| Structure | JSON + embedded outputs | XML <outline> tree |
| Best for | Data science, teaching, analysis | Subscriptions lists and mind maps |
How to convert IPYNB to OPML
- 1
Select your files
Select your IPYNB 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 OPML — structure preserved, heavy layout simplified.
About the IPYNB format
The Jupyter Notebook (.ipynb) is the working document of data science: a JSON array mixing markdown cells for narrative, code cells for Python/R/Julia, and their captured outputs — tables, charts, errors. Every Kaggle kernel, tutorial and analysis memo is one.
Notebooks are awkward to read outside Jupyter, and impossible to hand to management as-is. Converting to Markdown/Word/HTML turns the narrative plus results into a shareable report — or turns a written report into a ready-to-fill notebook skeleton.
+Strengths
- ✓Narrative + code + outputs in one artifact
- ✓The lingua franca of data-science workflows
- ✓Executables — results can be reproduced
!Limitations
- −JSON is unreadable without Jupyter
- −Outputs bloat files and leak secrets
- −Merge conflicts are notoriously painful
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
Why convert IPYNB to OPML?
Converting makes sense where the strengths of OPML meet what IPYNB cannot give you. Universal outline exchange between outliners Meanwhile JSON is unreadable without Jupyter One pass through the converter above puts your file on the right side of that trade-off.
Frequently asked questions
Is this IPYNB to OPML 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 IPYNB to OPML?
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 IPYNB file be preserved exactly?
This converter renders your IPYNB content into OPML 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 OPML result afterwards?
That depends on the target: OPML 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.