OPML Viewer

Parse an OPML outline / feed-subscription file and explore it as a nested, collapsible tree.

Drop an .opml file or click to browseMax 25 MB. Parsing happens entirely in your browser — nothing is uploaded.

OPML source

Outline tree

Paste or drop a valid OPML file to see its outline tree.

OPML viewer — inspect feed subscription outlines

OPML (Outline Processor Markup Language) is the standard XML format podcast apps and RSS readers use to export and import feed subscription lists. Under the hood it's just nested <outline> elements — folders group related feeds, and any outline with an xmlUrl attribute is an actual feed subscription (its htmlUrl points at the site itself).

Paste an OPML export from Feedly, Inoreader, NetNewsWire, Apple Podcasts, or any other reader above, or drop the .opml file directly, to see its folders and feeds rendered as a collapsible tree. Feed items link straight to the site's homepage, and the whole outline can be exported as JSON for further processing.

Everything runs locally with the browser's built-in XML parser — your subscription list is never uploaded anywhere. Need the reverse direction? Try XML Formatter or XML Validator to clean up or check the raw file first.

Private & free — this tool runs entirely in your browser.