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Details of the .ooxml file extension

The table below provides useful information about the .ooxml file extension. It answers questions such as:

  • What is the .ooxml file?
  • What program do I need to open a .ooxml file?
  • How can the .ooxml file be opened, edited or printed?
  • Where can I find the specifications for .ooxml?
  • Which MIME-type is associated with the .ooxml extension?
  • How can I convert .ooxml files to another format?
  • What are other, similar filename extensions to .ooxml?

We hope you find this page helpful and a valuable resource!

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

.ooxml file extension details

Office Open XML File

Office Open XML File .ooxml file icon
OOXML file is an Office Open XML File. An OOXML file is essentially a container for one or more XML files, which can contain a diverse array of data types. It was developed by Microsoft for representing spreadsheets, charts, presentations and word processing documents.
Category: Data files
Application: Microsoft Office
Mime-type: application/octet-stream
Magic number: -
Magic string: -
Sample: -
OOXML aliases:
OOXML related links:
OOXML related extensions:

Other types of files may also use the .ooxml file extension.

.ooxml file extension error

The .ooxml file extension is often given incorrectly!

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


Is it possible that the filename extension is misspelled?

We found the following similar file extensions in our database:

OXML 2.0 Data
open .ooxml file

Can't open a .ooxml file?

When you double-click a file to open it, Windows examines the filename extension. If Windows recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When Windows does not recognize a filename extension, you receive the following message:

Windows cannot open this file:


To open this file, Windows needs to know what program you want to use to open it...

If you don't know how to set the .ooxml file association, check the FAQ.

.ooxml file extension

Can I change the extension of files?

Changing the filename extension of a file is not a good idea. When you change a file's extension, you change the way programs on your computer read the file. The problem is, changing the file extension does not change the file format.

If you have helpful information about the .ooxml file extension, write to us!

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