FileInfo.com


.DEX File Extension


File Type 1 DEXIS Digital X-ray File  (Most common)
File Format File
Common? No
File Description 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.
Program(s) that open dex files Windows: DEXIS DEXview

File Type 2 Excel Spreadsheet
File Format Proprietary File
Common? No
File Description 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.
Program(s) that open dex files Mac / Windows: Microsoft Excel

File Type 3 Dalvik Executable File
File Format Proprietary File
Common? No
File Description Executable file format that contains compiled code written for Android, Google's Linux-based mobile phone platform; 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.
Program(s) that open dex files Mac / Windows / Unix: Google Android SDK

Information from FileInfo.com - The File Extensions Resource.
http://www.fileinfo.com/extension/dex