OpenDocument Text — LibreOffice/OpenOffice word-processing document.
Quick facts
What is .odt
A .odt file is a OpenDocument Text — LibreOffice/OpenOffice word-processing document.
In the mime-db registry it maps to application/vnd.oasis.opendocument.text, and it is marked as non-compressible. When serving .odt over HTTP, set the Content-Type header as shown in Developer info below.
Related entities: it maps to application/vnd.oasis.opendocument.text — and is delivered over HTTP via the Content-Type header.
How to open .odt files
Developer info
When served over HTTP, responses should set the following header:
Content-Type: application/vnd.oasis.opendocument.text
Common software that reads/writes .odt:
Relation chain
Related extensions
Related MIME types
Common uses
How to edit .odt files
How to create .odt files
Frequently asked questions
Common options include LibreOffice, Microsoft Word. You can also open many of these files with built-in viewers or a browser.
Create a new file in any text editor or the app that owns the format and save it with the .odt extension.
application/vnd.oasis.opendocument.text is the media type identifier used for .odt files during network transfer (for example in the HTTP Content-Type header).
Sources & standards
Updated 2026-08-18
Explore this reference