What Is an OPML File?
A file with the OPMLfile extensionis an Outline Processor Markup Language file.
This file format is often seen used as the import/export format forRSS feedreader programs.
OPML files in Windows 10.
TheThunderbird email clientshould work as well.
Tkoutlineand ConceptDraw’sMINDMAPcan open it, too.
On that note, any XML or text editor can be used to make changes to an OPML file.
OPML sample file.
