What Is an OXT File?

How to open, edit, and convert OXT files

A file with the OXT file extension is an Apache OpenOffice Extension file. They're used to add more features to OpenOffice applications, such as its Writer word processor, Calc spreadsheet program, and Impress presentation software.

You can download OXT files from the Apache OpenOffice Extensions page.

Screenshot of several OXT files in Windows 10
OXT Files.

How to Open an OXT File

The primary program used to open OXT files is OpenOffice, via its built-in Extension Manager tool. For v2.2 and later, you can just double-click or double-tap the OXT file to install it. 

Otherwise, here's how to manually install OXT files in OpenOffice:

  1. Open either the main OpenOffice program or one of its individual applications (Calc, Writer, etc.).

  2. Go to Tools > Extension Manager to open the Extension Manager window.

  3. Select Add at the bottom.

  4. Select the OXT file you want to import into OpenOffice, and choose Open. You can then close the Extension Manager window.

    OpenOffice add Extension screen with OXT file highlighted

OpenOffice can open an OXT file directly, but it also supports loading the extension from a ZIP file. This means you don't necessarily need to extract the file from its archive if that's how it was downloaded. OpenOffice can also open extensions that end with the UNO.PKG file extension.

With that being said, some OXT files are downloaded within ZIP or other archives because they include more information or other files that you need to do something with. For example, some ZIP files have a PDF "help me" document, fonts, and other relevant data that goes along with the extension.

The Extension Manager is also how you update extensions. To do that, return to Step 2 above and choose Check for updates. It's also how you disable or remove extensions-select an installed extension and them choose Disable or Remove to turn it off or completely uninstall it.

OXT files should also work with NeoOffice, a similar office suite for macOS that's based on OpenOffice.

How to Convert an OXT File

It's unlikely that there are any file converters available that can convert an OXT file to a different file format, because it's meant primarily for office suites like OpenOffice. Other programs use their own file formats for extensions.

Still Can't Open It?

The OXT file extension is spelled a lot like some other ones, such as POTX, making it easy to confuse them with each other. This is the primary reason a file won't open with OpenOffice's Extension Manager tool: because it's not really an OpenOffice Extension file.

If you double-check the file extension of your file and find that it really reads as .ODT instead of .OXT, what you really have is a text document that can only open with word processors, not function as an extension file.

OTX is another that looks a lot like OXT but actually belongs to a file format that goes by the name "theWord Encrypted Old Testament Text Module." OTX files store an encrypted copy of the Bible's Old Testament for use with the program theWord.

If it's not already clear, make sure to check the file extension of your file. If it's not an OXT file, then research the file extension on Lifewire or Google to see if you can find out which programs can open or convert it.

  • How do I get extensions for OpenOffice?

    You can get OpenOffice extensions from Apache's website or third-party websites. Alternatively, go to the Extension Manager and select Get More Extensions Online.

  • What are some other alternatives to Microsoft Office?

    There are many free alternatives to Microsoft Office including LibreOffice, WPS Office, SoftMaker, SSuite, and Zoho Docs.

  • Which is better, LibreOffice or OpenOffice?

    LibreOffice is a better free alternative to Microsoft Office because it supports Excel, Word, and PowerPoint files. Otherwise, the differences between LibreOffice or OpenOffice are mostly aesthetic.

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