CONVERT MD → OPML (MD to OPML)
Fast, secure MD to OPML conversion. No registration required.
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Ghostscript + QPDFHOW TO CONVERT MD → OPML
Drop the MD file
Upload your document — or a ZIP of several documents for batch conversion — through the web form.
Convert through pandoc
Our pandoc-based pipeline opens the MD, preserves structure and typography, and writes the OPML.
Retrieve the document
Click the download button; the OPML is delivered as a single file (or ZIP of files for batch jobs).
Why this pair exists — MD is Markdown, a plain-text format with minimal syntax that renders to formatted HTML. Ergo, the OPML route. A MD to OPML job turns one office document into another without retyping anything. Styles, pagination and embedded content cross the bridge cleanly because we use the same engine that powers professional document pipelines. Upload a MD file above, adjust any Advanced options, and download a ready-to-use OPML. Technical note: MD is Markdown, a plain-text format with minimal syntax that renders to formatted HTML. Compare that with OPML is a document format oriented around a particular office suite or publishing pipeline.
Why convert MD to OPML
Opening MD in the tool that natively reads OPML is rarely clean. Converting upstream rebuilds the document in the target format so headings become headings, lists stay lists, and the receiving tool does not flag layout warnings.
MD vs OPML — Technical specifications
Side-by-side comparison of the technical details.
MD
- MIME type
- text/markdown
- Extensions
- .md, .markdown, .mdown, .mkd
- Standard
- CommonMark, GitHub Flavored Markdown (GFM)
- Encoding
- UTF-8 (conventional)
- Companion spec
- RFC 7763 (2016)
- MIME Type
- text/markdown
- Extension
- .md
- Category
- Documents & Text
- Full Name
- Markdown
- Conversion Engine
- PANDOC
OPML
- MIME type
- text/x-opml
- Standard
- OPML 2.0 (2006)
- MIME Type
- text/x-opml
- Extension
- .opml
- Category
- Documents & Text
- Full Name
- OPML Outline
- Conversion Engine
- PANDOC
- Format
- XML with nested <outline> elements
- Primary use
- RSS subscription interchange
| Specification | MD | OPML |
|---|---|---|
| MIME type | text/markdown | text/x-opml |
| Extensions | .md, .markdown, .mdown, .mkd | — |
| Standard | CommonMark, GitHub Flavored Markdown (GFM) | OPML 2.0 (2006) |
| Encoding | UTF-8 (conventional) | — |
| Companion spec | RFC 7763 (2016) | — |
| MIME Type | text/markdown | text/x-opml |
| Extension | .md | .opml |
| Category | Documents & Text | Documents & Text |
| Full Name | Markdown | OPML Outline |
| Conversion Engine | PANDOC | PANDOC |
| Format | — | XML with nested <outline> elements |
| Primary use | — | RSS subscription interchange |
MD vs OPML — Strengths and limitations
What each format does best, and where it falls short.
MD Strengths
- Readable as plain text even before rendering — fits in version control beautifully.
- Dead-simple: 90% of needs covered in 10 minutes of learning.
- Converts trivially to HTML, PDF, EPUB, and DOCX via Pandoc.
- Every modern IDE, note-taking app, and developer tool renders it natively.
- Lightweight — a typical Markdown file is kilobytes, not megabytes.
Limitations
- No formal authoritative spec — CommonMark, GFM, and MultiMarkdown differ on edge cases.
- Tables and complex layouts are clunky; footnotes and math require extensions.
- Links to images stay external — no embedded media unless you base64-inline.
OPML Strengths
- Standard RSS subscription interchange format.
- Simple XML — easy to parse and generate.
- Highly extensible via arbitrary attributes.
- Supported by every major outline and RSS tool.
Limitations
- XML verbosity — larger than a JSON-based equivalent.
- Specification is loose — different tools disagree on edge cases.
- Primary use (RSS reading) has shrunk dramatically since Google Reader.
Quality & Compatibility
Headings, paragraphs, lists, tables, hyperlinks and inline images all survive the conversion with their semantic structure intact. Rare features unique to MD — legacy macros, form fields, obscure frame styles — are flattened to static content where no direct OPML equivalent exists. Tracked changes, where both formats support them, transfer cleanly.
Tips for Best Results
- Round-tripping between MD and OPML (converting back and forth) can accumulate small formatting drift — do one conversion and stay in that format.
- If the MD has tracked changes, accept or reject them before converting to avoid surprises in the OPML output.
- Very long documents split cleanly at existing section breaks; add section breaks deliberately if you need precise page boundaries.
Frequently Asked Questions
Yes, as long as the fonts are standard (system fonts or common office fonts like Arial, Calibri, Times, Helvetica). Custom corporate fonts survive if they are embedded in the source document; otherwise the conversion substitutes the closest available match, which can shift line breaks by a character or two.
Yes. Inline images are embedded into the OPML at full resolution, editable tables become native OPML tables, and hyperlinks keep their URLs. Complex features unique to MD — macros, form fields, track-changes — are mapped where an equivalent exists in OPML and flattened into static content otherwise.
All uploads go over TLS, files are processed in isolated containers and both the source and the output are deleted within two hours. No account is required, file contents are never indexed or used for training, and the paid plan adds a signable data-processing agreement for regulated workflows.
Markdown
Source formatMarkdown is a lightweight markup language that uses plain text formatting syntax. It is widely used in software development, technical documentation, and content management systems.
OPML Outline
Target formatOPML (Outline Processor Markup Language) is an XML format for structured outlines and lists. It is most widely used for exchanging RSS feed subscription lists between podcast apps and feed readers, and for hierarchical note-taking.
Going the other way? Convert OPML back to MD with the same engine.
Common Use Cases
Share across platforms
Send OPML files to anyone without worrying about whether they have the right software for MD.
Embed in documents
Drop OPML output into Word, Google Docs, PowerPoint, Notion or a website without conversion warnings.
Optimize size
OPML often produces smaller files than MD for web, email and storage.
Archive & future-proof
Store in a widely-supported format that will still open on future operating systems without legacy plugins.
MD vs OPML — Typical file sizes
Approximate file sizes for common scenarios.
- README 1-15 KB
- Blog post 2-30 KB
- Full technical manual 50 KB - 2 MB
- Typical RSS reader export (50 feeds) 5-30 KB
- Deep outline (Scrivener novel plan) 20-200 KB
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Related comparisons
See these formats side by side to understand which fits your use case best.
Related Guides
OPML Format Guide: Podcast Subscriptions, RSS Feeds & Outlines
Complete guide to OPML (Outline Processor Markup Language) — the universal format for podcast subscription exports, RSS reader migration, and hierarchical...
Read guide →Markdown: The Complete Guide to .md Format
Everything about Markdown — core syntax, GFM vs CommonMark, converting to PDF/HTML/Word, static site generators, and platform-specific variants.
Read guide →
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