Understanding ODT Files and Comparing Office Suites

An ODT file is a text document saved in the OpenDocument Text format, the open, free-to-use standard used by LibreOffice, Apache OpenOffice and many other programs. If someone has sent you a file ending in .odt and you are not sure how to open it, or you are weighing up which office suite to use, this guide explains what the format is, how it works, how to open and convert it safely, and how it compares with Microsoft Word’s DOCX format. Everything below was checked against the official OpenDocument standard and the current versions of the main office suites.

What is an ODT file?

An ODT file is a word-processing document stored in the OpenDocument Text format, which is the text flavour of the wider OpenDocument Format (ODF). It holds the same kinds of content you would expect in a Microsoft Word document: paragraphs, headings, styles, tables, images, hyperlinks and tracked changes. The difference is that ODT is an open standard rather than a format owned by a single company, so any developer is free to support it without paying a licence fee.

Because it is an open standard, ODT is designed for long-term access. A document you save today should still open cleanly in software years from now, which is one reason governments and public bodies around the world favour open formats for records they must keep for decades.

What does ODT stand for, and who controls the standard?

ODT stands for OpenDocument Text. The format is defined by the OpenDocument Format (ODF) specification, which is maintained by OASIS (the Organization for the Advancement of Structured Information Standards), a non-profit standards body. ODF is also published as an international standard, ISO/IEC 26300. The most recent version, ODF 1.4, was approved as an OASIS Standard in December 2025, coinciding with the format’s 20th anniversary. ODF 1.4 adds accessibility and formatting improvements while staying backward-compatible, so older ODT files keep working.

ODT is one member of a family of OpenDocument file types. Its close relatives are the OpenDocument Spreadsheet (the .ods format) and the OpenDocument Presentation (the .odp format), which do for spreadsheets and slideshows what ODT does for text documents.

What is actually inside an ODT file?

An ODT file is not a single block of data — it is a ZIP archive containing several XML files and folders. If you rename a copy of an .odt file to end in .zip, you can open it with any standard archive tool and see its parts. The main components are:

• content.xml — the actual text and tables of your document.
• styles.xml — the styles, fonts and formatting rules applied to that content.
• meta.xml — document properties such as author, title and editing time.
• settings.xml — application settings like the cursor position and view options.
• META-INF/manifest.xml — a list describing every file in the package.
• mimetype — a small, uncompressed file that identifies the archive as an OpenDocument Text file; by the specification it must be the first entry in the ZIP and must not be compressed.

This structure is why ODT files are usually compact and why a damaged archive can sometimes be repaired with ordinary ZIP tools — the formatting and the text are stored as readable XML rather than a proprietary binary blob.

How do you open an ODT file?

You can open an ODT file in every major office suite, and most of the options are free. The right choice depends on which program you already have and whether you prefer desktop software or a browser.

Opening ODT in LibreOffice or Apache OpenOffice

LibreOffice Writer and Apache OpenOffice Writer both use ODT as their native format, so they open and save it with no conversion and no loss of formatting. Install either suite, launch Writer, and either double-click the .odt file or choose File > Open. LibreOffice is the more actively developed of the two and is generally the best match for ODT; if you are deciding between them, our comparison of LibreOffice vs OpenOffice walks through the differences.

Opening ODT in Microsoft Word

Microsoft Word opens ODT files natively — no plugin or add-in is required. Word has been able to open and save .odt documents since Word 2010, and the ability to save as ODT was added back in Office 2007 Service Pack 2. In any supported version of Word (including Microsoft 365, Office 2024 and Word for Mac), just choose File > Open and select the .odt file, or double-click it if Word is your default word processor.

The one thing to watch is formatting. Word and ODT describe some features differently, so a complex layout created in LibreOffice may shift slightly when opened in Word, and a handful of Word-only features are not stored in the .odt format. For a document you intend to keep editing in Word, it is often cleaner to save it as DOCX. If you work the other way around and frequently receive PDFs instead, see our guide on how to open a PDF in Word.

Opening ODT in Google Docs

Google Docs can open and edit ODT files through Google Drive. Upload the .odt file to Drive, right-click it and choose Open with > Google Docs, and Drive converts it into an editable Google document. When you are finished you can download it back out as ODT, DOCX or PDF from the File > Download menu. This is handy for collaboration, because several people can edit the same document at once, but be aware that the round trip through Google’s format can introduce small formatting changes.

Opening ODT on phones and tablets

On Android and iOS you have several free options: Collabora Office and AndrOpen Office are mobile builds that handle ODT directly, while the Google Docs app opens ODT files stored in Drive. WPS Office, available on both mobile platforms, also reads ODT. On a phone the safest approach for simply reading a document is to export it to PDF first so the layout cannot shift.

How do you convert an ODT file to another format?

Converting an ODT file is usually as simple as opening it and re-saving it in the format you need. There are three reliable approaches, and you rarely need to pay for any of them.

• Use the office suite you already have. In LibreOffice, Apache OpenOffice or Microsoft Word, open the .odt file and choose File > Save As (or File > Export) and pick DOCX, PDF, TXT, RTF or HTML. This happens offline on your own computer, so it is the most private option and keeps formatting the most faithful.
• Use Google Docs. Upload to Drive, open with Docs, then use File > Download to export to DOCX, PDF and other formats. Good when you are already working in the browser.
• Use a reputable online converter. Trusted services such as CloudConvert and Zamzar convert ODT to many formats in a browser. Only use well-known services, and never upload confidential documents to a third-party website — convert those offline instead.

The most common conversion is ODT to PDF, because a PDF looks identical on every device and cannot be accidentally edited. We cover the safest way to do that, including how to keep your formatting intact, in our dedicated guide on converting ODT to PDF. If you need the reverse direction from a PDF, our walkthrough on turning a PDF into an editable Google Doc is a good starting point.

ODT vs DOCX: what is the difference?

The core difference is ownership. ODT is an open standard anyone can implement for free, while DOCX is Microsoft’s format, developed for and most closely tied to Microsoft Word. Both store text, styles, tables and images, and both are technically ZIP packages of XML, so in day-to-day use they feel similar. The practical differences show up in compatibility and in how each suite renders the other’s files.

• Compatibility: ODT opens in the widest range of free software, including LibreOffice, OpenOffice, Google Docs, WPS Office and Microsoft Word. DOCX also opens almost everywhere now, but it originated with Word and its most advanced features are best preserved there.
• Ubiquity: DOCX is far more common in business because Microsoft Word dominates the workplace, so you will receive DOCX attachments more often than ODT.
• Fidelity: A document stays most faithful when opened in software from the same family that created it. Moving a heavily formatted file between ODT and DOCX can cause small shifts in spacing, fonts or page breaks.
• Longevity: ODT’s open, vendor-neutral nature makes it a strong choice for archives and records that must remain readable for many years.

A simple rule of thumb: if you are sharing a document with people who use Microsoft Word, save it as DOCX; if you want an open, future-proof format or you use LibreOffice, stay in ODT; and if you want a document that looks the same for everyone and will not be edited, send a PDF.

Which office suite should you use for ODT files?

Every suite below can open ODT, but they differ in price, platform support and how fully they handle the format. The comparison table sets out the realistic options so you can match one to your needs. If you want a broader look at free and paid choices, our round-up of OpenOffice alternatives goes further.

What are the main features of ODT files?

ODT supports the full range of formatting you would expect from a modern word processor, which is why it works well for everything from a one-page letter to a long, structured report. The key features are:

• Styles and templates — define reusable paragraph and character styles so headings, body text and captions stay consistent, and save a document as a template for repeated use.
• Tables — build and format tables with custom borders, cell shading and merged cells to organise data inside a document.
• Images and graphics — insert, resize, crop and position pictures and simple drawings, with text wrapping around them.
• Hyperlinks and cross-references — link to websites, to other files, or to headings and bookmarks within the same document.
• Collaboration tools — track changes, add comments and compare document versions, so several people can review and revise the same file.
• Fields and automation — insert automatic fields such as page numbers, dates, a table of contents and an index that update themselves.

Common mistakes when working with ODT files

Most ODT problems come from a handful of avoidable mistakes. Knowing them in advance saves a lot of reformatting.

• Assuming formatting is identical across suites. A layout built in LibreOffice can shift when opened in Word, and vice versa. For a document whose appearance matters — a contract, a CV, a flyer — export a PDF before sending it.
• Not embedding fonts. If your document uses an unusual font that the recipient does not have installed, their software substitutes another font and the layout changes. Either stick to common fonts or turn on font embedding when you save.
• Editing the same file in two formats. Repeatedly converting a document back and forth between ODT and DOCX compounds small formatting errors. Pick one working format and only export copies in the other.
• Uploading sensitive files to random online converters. Free web converters are convenient but you are handing your document to a third party. Convert confidential material offline in your own office suite.
• Treating a corrupt file as lost. Because an ODT file is a ZIP archive, a damaged one can sometimes be recovered with your suite’s document-repair option or by extracting content.xml from the archive. Always keep a backup before experimenting.

Is the ODT format safe and private?

The ODT format itself is safe: it is an open, documented standard with no hidden tracking, and a plain .odt file cannot run code on its own. The privacy questions arise from how you handle the file, not from the format. When you edit an ODT document entirely in desktop software such as LibreOffice or Word, the file never leaves your computer. When you convert or edit it in a cloud service, a copy is uploaded to that provider’s servers.

In New Zealand that matters under the Privacy Act 2020 if the document contains other people’s personal information. Before using an online converter or a cloud editor for anything sensitive — client records, HR documents, financial details — check where the data is stored and prefer an offline tool. A document’s meta.xml also stores the author’s name and editing history, so remove document properties before sharing a file publicly if you would rather not reveal them.

Who should use the ODT format?

ODT suits anyone who wants a capable word processor without paying for one, and anyone who values an open, long-lasting format. It is a natural fit for students, home users, community groups and small organisations that rely on free software like LibreOffice. It is also a sound choice for public-sector and archival work, where open formats help guarantee that records stay readable for decades.

If your work revolves around Microsoft Word and you exchange documents mainly with Word users, DOCX will cause fewer formatting surprises day to day — though you can still open and save ODT in Word whenever you receive one. For most people the pragmatic answer is to keep both in mind: work in whichever format your main program uses, and remember that ODT guarantees you a free, open way to open almost any text document you are sent.

Frequently Asked Questions (FAQ)

Can I open an ODT file without installing any software?

Yes. If you have a Google account you can upload the .odt file to Google Drive and open it with Google Docs in your browser, with nothing to install. The free online versions of some suites can also display ODT. For a document you only need to read, asking the sender for a PDF is often the simplest option.

Does Microsoft Word support ODT files?

Yes. Microsoft Word opens and saves ODT files natively, with no plugin, and has done since Word 2010. Just use File > Open to open one or File > Save As and choose OpenDocument Text to save one. Very complex layouts may shift slightly between Word and ODT because the two formats handle some features differently.

Is ODT better than DOCX?

Neither is simply better; they suit different needs. ODT is an open standard that works across the widest range of free software and is ideal for long-term archiving. DOCX is Microsoft’s format and is far more common in business, so it causes fewer surprises when you share with Word users. Choose based on who you are sharing with and which program you use.

How do I convert an ODT file to PDF for free?

Open the file in LibreOffice, Apache OpenOffice, Microsoft Word or Google Docs and use the Export to PDF or Save As PDF option. This is free, works offline in the desktop suites and keeps your formatting intact, which makes it safer than uploading a sensitive document to an online converter.

Why does my ODT file look different on another computer?

The usual causes are a different office suite rendering the layout its own way, or a font used in the document not being installed on the other computer. Embedding fonts when you save, sticking to common fonts, or sending a PDF instead will keep the appearance consistent across devices.