How to Open an ODT File on Windows — Word, Phone, or No App at All (Tested)
An attachment ends in .odt and nothing on the PC seems to want it. ODT is the OpenDocument Text format, used by LibreOffice and other office suites, and Microsoft Word can open and save it. I built a test document in Word on Windows 11 (headings, bold and red text, a bulleted list, a table, an image, page numbers), saved it as .odt, then opened that file again in Word and in Hangul 2024 to see what survives. I also opened the file as a zip to see what's inside.
What an ODT file is
ODT stands for OpenDocument Text, a word-processing format used by LibreOffice and other office suites. Microsoft's support page for Word describes it as "the OpenDocument Text (.odt) file format used by some word processing applications" and lets Word open and save it.
Inside, it's a zip archive. My test .odt (36,299 bytes; the same document as .docx was 51,458 bytes) started with the zip signature, and its first entry was a file called mimetype containing application/vnd.oasis.opendocument.text. The text lives in content.xml, the layout in styles.xml, and Word put the image in a media folder.
Open it in Microsoft Word
- 1In Word, choose File → Open → Browse.
- 2Change the file type list to OpenDocument Text.
- 3Pick the .odt and choose Open.
Those are the steps from Microsoft Support. On this Windows 11 PC the .odt extension was registered to Word.OpenDocumentText.12, whose open command is WINWORD.EXE, so a double-click opened it directly.
Reopening the Word-made .odt in Word gave the same character count (136), one table, one image, the bold and red words, the Heading 1 style and footer page numbers as the .docx. Microsoft still warns that an ODT "might not have the same formatting" as in the app that created it — my file was made by Word itself, so a LibreOffice-made file may not come through as cleanly. I didn't have LibreOffice on this PC to test that.
If you edit an .odt in Word and send it back, Microsoft suggests closing the file and opening it again first to check how it looks.
When Word isn't installed
- WordPad is no longer an option. Microsoft Learn's deprecated-features list says WordPad is removed from all editions of Windows starting with Windows 11, version 24H2. This PC (build 26300) didn't have it.
- LibreOffice is a free office suite that works with ODT files (not installed here, so not tested).
- On a phone: Google's Docs Editors Help says the Google Docs Android app can open and edit ODT files.
- Korean users with Hangul (HWP) 2024: it opened the file with text, table and image, but added "1." before the title, didn't show page numbers, and shrank table rows to 3.9 mm so text touched the borders.
No app at all: open it as a zip
- 1Copy the .odt (work on the copy).
- 2Rename the copy's extension from .odt to .zip.
- 3Open it in File Explorer — in my Word-made file the images were in the media folder.
The text is there too, in content.xml, but mixed with XML tags — fine for finding a sentence, not for reading a document.
FAQ
Q. Is an ODT file safe to open?
It's a document format, not a program. As with any attachment, open it only if you trust the sender.
Q. Can I convert ODT to DOCX?
Yes — open it in Word and use Save As → Word Document (.docx). To keep a Word version of the file, Microsoft says to save it as .docx first.
Q. Why does my ODT look different in Word?
Word and the app that made the file support different features. Microsoft says some formatting may not carry over. My Word-made test file came back unchanged; a file made in another app may not.
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