Filename Extensions
If you are seeking information about file extensions, then you are in the right place at right time.

Details of extension .opml

1 extension(s) and 0 alias(es) in our database

Below, you can find answers to the following questions:

  • What is the .opml file?
  • Which program can create the .opml file?
  • Where can you find a description of the .opml format?
  • What can convert .opml files to a different format?
  • Which MIME-type is associated with the .opml extension?
Outline Processor Markup Language File .opml file icon

Outline Processor Markup Language File

The OPML file is an Outline Processor Markup Language file. It is an XML-based format that allows exchange of outline-structured information between applications running on different operating systems and environments. Originally developed by Radio UserLand as a native file format for an outliner application, it has since been adopted for other uses, the most common being to exchange lists of web feeds between web feed aggregators.
Category: Document files
Application: OPML Editor
Program name: -
Mime-type: text/x-opml
Magic bytes (HEX): -
Magic string (ASCII): -
Related extensions:
Extensible Markup Language File

Other types of files may also use the .opml file extension. If you have helpful information about .opml extension, write to us!

Is it possible that the filename extension is misspelled?

We found the following similar extensions in our database:

Outsystems Markup Language Data
OpenPanorama Lensflare File
FM Operator Type-M Voice Data
Palm Markup Language File
Personalized Print Markup Language Document

The .opml filename extension is often given incorrectly!

According to the searches on our site, these misspellings were the most common in the past year:

ppml (1), opm (1), oml (1), pml (1), opl (1)

Can't open a .opml file?

If you want to open a .opml file on your computer, you just need to have the appropriate program installed. If the .opml association isn't set correctly, you may receive the following error message:

Windows can't open this file:

File: example.opml

To open this file, Windows needs to know what program you want to use to open it. Windows can go online to look it up automatically, or you can manually select from a list of programs that are installed on your computer.

To change file associations:

  • Right-click a file with the extension whose association you want to change, and then click Open With.
  • In the Open With dialog box, click the program whith which you want the file to open, or click Browse to locate the program that you want.
  • Select the Always use the selected program to open this kind of file check box.

Supported operating systems

Windows Server 2003/2008/2012/2016, Windows 7, Windows 8, Windows 10, Linux, FreeBSD, NetBSD, OpenBSD, Mac OS X, iOS, Android