The File Extensions Database

.DEX File Extension

  • Developer by: Google
  • Category: Developer Files

What is an .DEX file?

.DEX is Dalvik Executable File

A DEX file is an executable file saved in a format that contains compiled code written for Android, Google's Linux-based mobile phone platform. It is technically referred to as a "Dalvik Executable," and can be interpreted by the Dalvik virtual machine.

DEX files can be created manually or by automatically translating compiled Java programs. Multiple DEX files are zipped into a single .APK package, which serves as the final Android application file.

Programs that open Dalvik Executable File
Google Android SDK
Google Android SDK
Google Android SDK
File Type 2 Disketch Project File
Developer by: NCH Software Category: Data Files Format: Binary

Disc label project created by Disketch label design software; saves the layout for a CD or DVD and can include text and imported images; may be printed with a standard printer or a printer that supports disc labels.

Disketch now uses the .DEPROJ extension for disc label projects. The DEX format is deprecated but can still be opened by current versions of Disketch.

Programs that open Disketch Project File
NCH Disketch
File Type 3 Excel Spreadsheet
Developer by: Microsoft Category: Spreadsheet Files Format: Binary

Spreadsheet or group of spreadsheets created by MS Excel; contains data formatted in cells, which are organized into rows and columns.

The .XLS extension is much more commonly used for Excel files.

Programs that open Excel Spreadsheet
Microsoft Excel 2016
Microsoft Excel 2016
File Type 4 DEXIS Digital X-ray File
Developer by: DEXIS Category: Data Files

X-ray image saved in the proprietary X-ray format; used by the DEXIS Digital X-ray system for dental imaging; captures dental radiographs and saves them in a digital format.

DEXIS was acquired by Danaher Corporation in 2005.

Programs that open DEXIS Digital X-ray File

How to solve problems with DEX files

  • Associate the DEX file extension with the correct application. On :
    Windows: Right click on any DEX file and then click "Open with" > "Choose another app". Now select another program and check the box "Always use this app to open *.DEX files". Mac: Right click (or Ctrl-click) the DEX file, then click "Open with" > "Other...". Then choose another program and check the "Always Open With" box. Linux: Right click on the file, and select "Open with" and choose another program. iPhone: Tap the file. If you do not see an app to open the file, then tap Share "Share" and choose an app. Alternatively, save the file. Then open the Files app Files app. There long-press on the file, then release your finger. You will see a black menu bar. Then tap "Share" and select an app. Android: Tap the Settings icon on your smartphone, then tap on the Apps section. There tap the Options icon in the top right-hand corner of the screen to change the default apps.
  • Update your software that should actually open .DEX is Dalvik Executable File. Because only the current version supports the latest DEX file format. Search, therefore, e.g. on the Google manufacturer website after an available .DEX is Dalvik Executable File update.
  • To make sure that your DEX file is not corrupted or virus-infected, get the file again and scan it with antivirus software.