Software & Apps File Types What is an EXD File? by Tim Fisher General Manager, VP, Lifewire.com Tim Fisher has 30+ years' professional technology support experience. He writes troubleshooting content and is the General Manager of Lifewire. our editorial process Facebook Twitter LinkedIn Tim Fisher Updated on February 20, 2020 Microsoft Office File Types Design Cryptocurrency MS Office Windows Linux Google Drive Apps File Types Backup & Utilities View More Tweet Share Email The EXD file extension is a Control Information Cache file. Microsoft Office programs build EXD files automatically when an ActiveX control has been inserted into a document. The EXD file is a temporary file with the purpose of speeding up the process of adding controls into the document, like option buttons and text boxes. The program normally removes EXD files when it no longer requires that ActiveX control. Some EXD files might also be XML-based documents used with some reader programs for blind or hard-of-sight computer users. How to Open an EXD File Some EXD files can also be opened with parts of the Microsoft Office suite like Word, Excel, and PowerPoint. These same EXD files can also be opened with Microsoft's Visual Studio. Microsoft programs typically store EXD files in the user's \AppData\Local\Temp\ folder, either under an Excel or VBE subfolder. Troubleshooting EXD Files If you're having issues with broken macros in Microsoft Word or Excel, be sure the program is closed down and then delete the EXD files found in these folders to restore functionality (you can do this manually or with the Temp File Deleter tool). Microsoft has offered more information on this fix, as well as what patch from Windows Update is to blame for it. Your EXD file is most likely in the format described above, but the Netherlands-based site passendlezen.nl also uses EXD files that are saved in the XML format. It's possible that renaming the .EXD file to .XML will let you open it with an XML reader. Files with the EXD extension look a lot like ones that have the ESD, EXE, and HXD file extension. If your EXD file isn't opening using the information from above, you might double-check to make sure you're not misreading what type of file it is. If a program on your computer opens EXD files, but it shouldn't or you'd rather another program be that default program, there are ways to change file associations in windows. How to Convert an EXD File We don't believe there's any reason to convert a Control Information Cache file to any other format. These files are used exclusively in Microsoft programs and are only designed to work with ActiveX-related objects, so converting them would be useless even if such a file converter existed. If you suspect your EXD file might be used with an application related to the passendlezen.nl website, we suggest either contacting them for more information or renaming the file to an XML file. If that works, you can then convert it like you can any XML file.