Documents

What is an ODT file?

Updated Jul 2026

Definition

ODT (OpenDocument Text) is an open standard file format for word processing documents, used as the default save format by many free office programs. It stores text, formatting, and images without any loss in quality. Its main limitation is that it isn't the default format in the most common word processor, so it sometimes needs converting before it opens cleanly elsewhere.

ODTOpenDocument Text

Extension: .odt
Type: Documents
Typically: LibreOffice / OpenOffice

Why ODT exists

ODT is part of the OpenDocument format, a standard created in the early 2000s as a non-proprietary way to save office documents. It was designed so no single company controls the format, and several free desktop office programs adopted it as their default file type.

Under the hood, an ODT file is a zip archive holding a set of XML files, one for the text and structure, others for styles, layout, and any embedded images. Because everything about the document, down to fonts and spacing, is saved in this structured way, opening the file later reproduces it exactly, as long as the software reading it understands the same standard.

The friction shows up in workplaces and schools that have standardized on a different word processor as the default. An ODT file sent there may open with shifted formatting, missing fonts, or not open at all, which is usually the moment someone needs to convert it to a more common format like DOCX.

The trade-offs

Strengths

Free and open standard with no licensing lock-in
Keeps text, formatting, and images intact since it's lossless
Default format for several free office programs
Works the same way across different operating systems

Watch-outs

Not the default in most workplaces, so recipients may not open it correctly
Formatting can shift slightly when opened in a different word processor
Less universally recognized than DOCX by print shops and older software
Embedded fonts aren't always preserved when moving between programs

A note on privacy

An ODT file can carry hidden metadata inside it, including the document author's name, the organization it was created under, and a history of edits and comments. Upload it to an online converter and all of that travels along with the document text to someone else's server. Converting locally, the way Morphjet does, keeps the text and that metadata on your own machine the whole time.

Convert an ODT file

Questions

How do I open an ODT file?

Several free office programs open ODT natively. If you only have a paid word processor installed and it won't open the file cleanly, converting it to DOCX first usually solves it.

Is ODT better than DOCX?

Not exactly better, just different tradeoffs. ODT is an open standard with no licensing restrictions, while DOCX is more widely supported since it's the default almost everywhere. The right choice usually comes down to what the person you're sharing with can open.

Why does my document save as ODT?

If you're using a free office program, ODT is often set as its default save format, the same way DOCX is the default in other word processors.

Will I lose formatting converting ODT to DOCX?

Basic text, images, and simple layouts usually convert cleanly. Complex formatting, unusual fonts, or tracked changes are more likely to shift a little, so it's worth checking the result before sending it on.

Can I convert ODT without uploading it?

Yes. A desktop app like Morphjet converts ODT files, including their formatting and any embedded metadata, right on your computer without sending anything to a server.

Morphjet opens and converts ODT and 1,800+ other formats, all on your own computer. Launching this July.