Import an OPML subscription tree with folders, feed URLs, and extension fields.
The frame below runs the same code as this page, in the reader's own browser. Nothing is sent to us, and nothing is sent to you.
Pick a dark background and the text and panels follow it, so the frame stays readable on a dark page.
The XML outline tree becomes nested nodes preserving text, type, xmlUrl, htmlUrl, and extension attributes. Feed outlines retain folder hierarchy rather than flattening into one list.
<?xml version="1.0" encoding="UTF-8"?>
<opml version="2.0">
<head><title>My Feeds</title></head>
<body>
<outline text="Tech" type="rss" xmlUrl="https://example.com/feed.xml" htmlUrl="https://example.com"/>
</body>
</opml>
Text: Tech Type: rss XML URL: https://example.com/feed.xml HTML URL: https://example.com
Feed migrations, podcast lists, and shared reading bundles parse OPML.