.OPML File Extension

There is only one file type that uses the .OPML extension:

Outline Processor Markup Language File

Outline Processor Markup Language File
  • Developer The Omni Group
  • Popularity
    4.0 (21 votes)
  • Category Web Files
  • Format XML

Outline document written in OPML (Outline Processor Markup Language); used to exchange lists of Web feeds (such as .RSS files) between Web feed aggregators; also used for other general outlining purposes.

Each OPML file contains the following XML elements:

  1. OPML version - e.g. "1.0"
  2. Head - contains metadata that describes the content
  3. Body - contains the content of the outline
  4. Outline - contains a line in the outline
Software's name License Platforms
CS Odessa ConceptDraw MINDMAP CS Odessa ConceptDraw MINDMAP Commercial MacWindows
OPML Editor OPML Editor Free MacWindows
The Omni Group OmniOutliner 4.5 The Omni Group OmniOutliner 4.5 Free Trial Mac
Tkoutline Tkoutline Free MacWindows

Updated: August 11, 2019

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