.EDMX File Extension

File Type:
ADO.NET Entity Data Model Designer File

Having trouble opening .edmx extension? Don't panic! This page explains what edmx files are as well as suggests programs you may use to open edmx files. You can download these programs through this page.

What is a EDMX file?

Edmx file extension has ADO.NET Entity Data Model Designer file type, developed by Microsoft, which is associated with the "developer files" category.

Entity Data Model Designer is a component of Microsoft Visual Studio that creates data model files with this extension. EDMX files contain a database scheme with database tables, fields, and their relationships. EDMX files are often used for building SQL Server database schemes. They include three metadata files: CSDL (the conceptual schema definition language), SSDL (the store schema definition language), MSL (the mapping specification language). 

To learn how you can open the given file, read the information below.

edmx file icon
File Type:
ADO.NET Entity Data Model Designer File
Developer Files

How to open EDMX file?

Double click the edmx file to open it. The file will open automatically if file associations have been correctly installed and there is a proper program on your computer; if not, file associations may be corrupted and your OS either cannot find the proper program, or you might not have one for opening the file. First, we recommend downloading our utility to fix file association errors; then, you can download any program for opening the .edmx extension from the ones suggested below. If you are certain there is nothing wrong with the file associations, you may proceed to method 2 right away; besides, if you can't make up your mind when choosing the right program, use Universal File Viewer from the last method.

Method 1: Fix file association errors

Follow these steps in order to automatically fix the edmx extension associations' problem in no time:

  • Step 1: Click on "Download Solution" to download automatic tool provided by WikiExt.
  • Step 2: Click "Start Scan" to identify all potential issues.
  • Step 3: Review scan results and click "Fix Items".

File Size: 3.04 MB, Download time: < 1 min. on DSL/ADSL/Cable

This Tool is Compatible With: Windows XP, Vista, 7, 8/8.1, 10

Method 2: Download the appropriate software

The given list provides programs which may be used for opening or converting the edmx file. Choose the proper program for your OS, and click it to start the download or proceed to the developer's website.

Programs that open EDMX files

Method 3: Use universal file viewer

In addition to the list of programs above, we recommend using Universal File Viewer. This tool can open over 250 file extensions and, most likely, it will be able to open the edmx file as well. Download Universal File Viewer for your OS.

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