Free online MD to OPML converter

Markdown (MD) is a lightweight markup format commonly used for notes, documentation, and web content. OPML is an XML-based outline format often used for hierarchical lists, RSS feed lists, and structured notes. Converting MD to OPML turns Markdown headings and lists into an outline that can be imported into outliners, feed readers, and note-taking tools.

Why convert md to opml

Markdown is great for writing, but OPML is better when you need a structured outline with nested levels. This conversion is useful for:

• moving notes into outline-based apps
• sharing hierarchical content between tools
• organizing headings and bullet lists as an outline
• preparing content for RSS or outliner workflows

How the conversion works

In most cases, Markdown headings become OPML outline nodes, and nested bullet lists become child items. For example:

• # Heading 1 becomes a top-level outline item
• ## Heading 2 becomes a nested item
• - Bullet becomes an outline entry under the current parent

Because OPML is XML-based, the output must preserve hierarchy carefully. Plain paragraphs may be converted into outline nodes or notes, depending on the converter.

Best software for md to opml conversion

The best choice depends on whether you want a quick online conversion or a reliable desktop workflow.

• pandoc — best for advanced users and automation; can convert Markdown to structured formats with scripting support
• MarkEdit or similar Markdown editors — useful if they support export via plugins or scripts
• Online converters — convenient for simple files, but check formatting accuracy and privacy
• Custom scripts using Python or Node.js — best when you need precise control over heading levels and list nesting

If you need the most dependable workflow, Pandoc plus a small script is often the best option for batch conversion and repeatable results.

Recommended conversion workflow

1. Open the Markdown file in your editor.
2. Check that headings and lists are properly nested.
3. Convert the structure into OPML outline nodes.
4. Validate the resulting OPML file in an outliner or XML viewer.
5. Save the output with the .opml extension.

Things to watch for

• Tables may not convert cleanly into OPML outlines.
• Code blocks may need to be stored as notes or plain text nodes.
• Links and formatting may be simplified depending on the converter.
• Deep nesting should be checked to ensure the outline remains readable.

Summary

MD to OPML conversion is ideal when you want to transform Markdown content into a structured outline. For the best results, use a tool that preserves hierarchy accurately, and choose Pandoc or a custom script if you need reliable, repeatable conversion.