- Microsoft Office Opens and saves ODT and ODS files, but may alter some of the format due to differences between ODF and OOXML.
- On desktop and mobile iOS The conversion usually involves read-only modes or generating DOCX/XLSX/PPTX copies.
- Older versions of Office required add-ins like OpenXML/ODF Translator or the use of suites like LibreOffice.
- On mobile devices, many ODT viewers distort the design, so for serious work it is advisable to use more complete applications or native Office formats.
Working with .odt documents and .ods spreadsheets in Microsoft Office is increasingly common, especially if you share files with people who use LibreOffice or OpenOffice. The problem arises when opening them in Word or Excel causes everything to go wrong: strange margins, broken tables, changed fonts… and you have to waste time readjusting the formatting.
If you want to open ODT and ODS files in MS Office without corrupting the original layout , understanding what each program supports and how to properly convert the files is key. While Office currently offers considerable support for OpenDocument , it's not perfect, and you need to be aware of its limitations and workarounds to avoid problems, especially if you're sending documents to clients, professors, or colleagues who only use Office.
What exactly is ODT/ODS and how does it work with Microsoft Office?
The .odt (text), .ods (spreadsheet), and .odp (presentation) formats are part of the OpenDocument Format (ODF) standard, used by suites such as LibreOffice, OpenOffice, and Google Docs . Microsoft Office, on the other hand, primarily uses OOXML formats: .docx, .xlsx, and .pptx . While both systems are compatible in many aspects, they are not identical in every way.
In modern versions of Office (on Windows , Mac , iPhone , and iPad ) , you can now open ODT, ODS, and ODP files directly without installing anything extra. However, just because they can be opened doesn't mean the formatting will be 100% preserved. There are differences in how each suite interprets styles, tables, embedded objects, and some advanced features.
In fact, Microsoft's own documentation warns that when working with ODS sheets or ODT documents in Excel and Word, some of the original formatting may be lost. This is because Excel/Word and OpenDocument-based applications do not offer exactly the same design options, styles, or advanced features.
Therefore, if you need the file to travel back and forth (for example, someone creates it in LibreOffice and another person edits it in Word), you'll have to get used to a few minor variations. Even so, you can minimize many problems by following certain guidelines and making good use of the saving and conversion options.
Open and save ODS files in Excel without losing (too much) formatting
Excel has been able to open and save spreadsheets in .ods format for several versions now. This allows you to exchange files with users of Calc (OpenOffice/LibreOffice) or Google Sheets without too much trouble, although there are some nuances you should be aware of.
To open an ODS spreadsheet in Excel from Windows, the process is simple: just go to File > Open > Computer > Browse and locate the file. If you want to display only OpenDocument files, you can use the file type dropdown menu next to the "File name" box and select OpenDocument Spreadsheet (*.ods) . This will reduce the number of results and help you find what you're looking for more quickly.
Once you select the file and click Open , Excel loads the ODS sheet and tries to preserve its structure as much as possible: sheets, data, cell formatting, basic styles, borders, and most of the standard formulas. If you also work with imported files (for example, CSV), review how to open CSV files in Excel . However, if the original document uses very specific Calc features, custom macros, or non-standard functions, it's likely that not everything will be reproduced exactly.
When you want to save an Excel spreadsheet directly as an .ods file instead of opening it, you can do so without using external programs. In this case, go to File > Save As > This PC > Browse , type the desired name, and in the "Save as type" dropdown menu, choose OpenDocument Spreadsheet (*.ods) . This will generate a file compatible with ODF suites, which can open it without problems.
The warning, as with opening, is that saving to .ods from Excel may result in the loss or modification of some formatting . Elements such as advanced styles, certain types of tables, complex charts, or Excel-specific functionalities (for example, some pivot table formats) may not translate exactly to the OpenDocument standard.
Microsoft actually documents specific differences between the .ods and .xlsx formats , explaining that some Excel features don't exist in ODF, so there's no perfect way to map them. If your absolute priority is for the file to look identical on all computers running Excel, it's best to keep a copy in .xlsx format and use the .ods file only as a sharing file.
Opening ODT documents in Word: current support and limitations
The situation with .odt text documents in Microsoft Word is similar to that of ODS spreadsheets in Excel. These days, if you have a recent version of Office for Mac or Windows, you can open ODT files almost like DOCX files, without any intermediate screens or additional add-ins.
In many cases, Word will display the ODT document with all its formatting: aligned paragraphs, tables with their structure, headers, footers, and much of the original design. It's quite common for the overall appearance of the document to remain very similar to how it looked in LibreOffice Writer, for example.
However, not all advanced features work equally well. Certain complex layout options, custom styles, specific fields, or advanced numbering can be affected, especially when the document has been extensively edited using Writer's specialized tools.
On Mac, many users have noticed that Word opens their .odt files "without a hitch ," leading to the question of whether this support is now standard across all Office applications. Yes, ODT support has become native in modern versions, although it's still subject to the limitations of translation between standards. Your luck wasn't a fluke: it's part of the suite's current support.
The key point is deciding whether it's worth sending ODT files to Office users . If you know that the recipients only work with Word and aren't interested in using other programs, it's usually better to convert the document to DOCX to avoid any surprises. Even so, if the file is relatively simple (plain text, a few simple tables, and little else), using ODT is quite safe these days.
Office on iPhone and iPad: How it handles ODT, ODS, and ODP files
On mobile devices , things are a little different. Office for iPhone and Office for iPad have also gradually incorporated support for OpenDocument, so you can now directly open .odt, .ods, and .odp files from the Word, Excel, and PowerPoint apps for iOS.
When you want to open an ODF file on your iPhone or iPad, the typical flow is as follows: in the Word, Excel, or PowerPoint app, you tap Open , choose the file location (OneDrive, SharePoint , Dropbox, or the iPhone/iPad's own local storage ), and then select the ODT document, ODS sheet, or ODP presentation you are interested in.
The first time you open a file of this type, you'll see a notification asking for permission for Microsoft to convert the file using an online service . This conversion process is what allows the content to be displayed within the mobile app as an editable Office document (DOCX, XLSX, or PPTX), although it often opens initially in read-only mode.
After the conversion, the app will often display a notification indicating that the file is read-only . In practice, what's happening is that the original ODF file is treated as the source, and an OOXML version is generated, which is the one you actually manipulate on your mobile device. If you want to edit and save changes, you'll usually have to save it as a standard Office document.
This means that, on iPhone and iPad, the ideal workflow is to use ODT/ODS/ODP files as the input format , work on the conversion to DOCX/XLSX/PPTX, and, if you need to return the file in ODF, save it again from a desktop version of Office or use a suite compatible with OpenDocument.
Adjust the default file type in Office installations via Intune
In managed corporate environments, such as those that use Microsoft Intune to deploy Office , it is possible to encounter curious situations: for example, installations where the default formats when creating new documents are not DOCX/XLSX/PPTX, but rather ODT, ODS and the like.
If, when deploying Office using Intune, you find that the default file type appears as .odt/.ods and doesn't offer a clear option to revert to Microsoft's native formats, it's because this configuration usually depends on several layers: settings within the suite itself, group policies, templates, or even options defined in the installation package.
In these cases, it's advisable to check if Intune's policies (or the configuration of the Office Deployment Tool suite being used) have established any compatibility preference for OpenDocument . Sometimes, due to previous organizational decisions, ODF is favored as the default format to ensure interoperability with other platforms.
If the goal is for Word, Excel, and PowerPoint to use traditional OOXML formats by default , it will be necessary to review these deployment parameters, update policies, or even modify user templates so that "Save As" leans back towards DOCX/XLSX/PPTX.
The moral of the story is that, although Office offers fairly decent ODF support, it is not mandatory to adopt it as an internal standard format ; the decision is usually made at the organizational level, and tools like Intune allow you to force one option or the other for all managed teams.
Classic add-ins and solutions for older versions of Office (pre-2007)
If you're still using very old versions of Microsoft Office (pre-2007) , the situation is different. Those versions don't come with built-in support for ODT, ODS, or ODP files, so simply opening an OpenDocument file won't work.
For years, a common solution was to install the OpenXML/ODF Translator Add-ins for Office package , available at the time from odf-converter.sourceforge.net . This add-in integrated into Word, Excel, and PowerPoint, adding the ability to open and save files in the ODF format used by OpenOffice.
Once that translator was installed, the user could access new options in the File menu, such as "Open ODF…" to open .odt, .ods and .odp documents, or "Save As ODF…" to save the work in that open standard from Microsoft applications.
Although it is not the ideal solution today (mainly because it has become outdated and modern versions of Office already come with built-in support), it is still a key tool for those who have to maintain computers with very outdated Office but need to exchange documents with OpenOffice or LibreOffice users.
Of course, a much simpler alternative is to install OpenOffice or LibreOffice directly on those older computers and use those suites to open and save ODF files. In many cases, having both suites running simultaneously (Office for older documents and LibreOffice for ODF) can be more practical than relying on outdated add-ins.
Viewing ODT on mobile devices: apps and format limitations
In the mobile field, especially on Android and iOS smartphones, there are many ODT file viewers that allow you to open text documents in OpenDocument format, but they tend to offer quite inconsistent results in terms of preserving the layout.
Applications like OpenDocument Reader, OpenOffice Viewer, LibreOffice & OpenOffice Document Reader , or even Chrome extensions like ODT, ODP, and ODS Viewer , work well if all you want to do is read the text. However, it's very common for the formatting to become distorted: strange line breaks, changed fonts, and completely misaligned layouts.
This means that, although these apps are useful for quickly consulting the content of an ODT , they are not recommended for reviewing design details or for showing a document already laid out in a presentation, meeting, or project defense.
If you need to edit ODT, ODS, or ODP files with some precision on Android, one of the most interesting options is AndrOpen Office , a mobile adaptation of OpenOffice. It's free and offers many of the features of the desktop suite, including advanced editing and robust support for the ODF format.
However, to truly get the most out of AndrOpen Office, it's best to use your mobile phone almost like a small computer; that is, connect a Bluetooth mouse or keyboard, or use a tablet with a larger screen. Otherwise, handling complex documents on a tiny screen is awkward and prone to errors.
In the case of the Apple ecosystem, although there are viewers and Office for iOS itself offers ODF opening with cloud conversion, the general recommendation remains to use native Office formats when design is critical, and reserve ODT for text queries or more occasional exchange flows.
Ultimately, if your priority is to avoid losing formatting when opening ODT/ODS files on different devices, the most reliable approach is still to work with the same suite on all computers , or to convert the document upon arrival and briefly review it to detect any discrepancies.
Today, Microsoft Office offers fairly decent support for opening and saving ODT and ODS files, both on desktop and mobile, but there are still small differences between the OpenDocument standard and Office's native formats that can lead to design changes. Therefore, the smartest approach is to combine best practices (backing up to DOCX/XLSX, reviewing after conversion, and carefully choosing the mobile app) to avoid surprises and keep your documents looking professional on any platform.
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