This article describes what an ODT file is, how to open it on any device, and how to convert it to DOCX and other common document formats.

An ODT file is an OpenDocument Text document. These files are usually created by the free word processing program OpenOffice Writer.

ODT files are similar to the popular DOCX file format used with Microsoft Word. They are both document file types that can contain things like text, images, objects, and styles, and are compatible with many programs.

If your file is not a document, it may instead be a dialog theme used with the Origin data analysis and graphing software. These files are formatted in XML and are used to change how various dialogs are displayed in the program.