All about DBML Files

The DBML file type is primarily associated with Visual Studio.

DBML	File extension: DBML
	File type:	database schema definition

What is a DBML file?

DBML files mostly belong to Visual Studio by Microsoft. A DBML file contains source code written in Database Markup Language. It defines/documents the schema of a database. dbml2sql is the official command line tool for generating SQL database queries from a DBML file. The table schema of users with an ID and a username will look as follows:


Table users 
id integer
username varchar

DBML is also the filename extension of an XML-encoded database schema written in the Database Markup Language by SQL Server Management Studio and Visual Studio. .NET framework's LINQ (Language Integrated Query) can compile a DBML file into a database query (SQL).

How do you open DBML files?

You need a suitable software like Visual Studio to open a DBML file. Without proper software you will receive a Windows message "How do you want to open this file?" or "Windows cannot open this file" or a similar Mac/iPhone/Android alert. If you cannot open your DBML file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a DBML file directly in the browser:. Just drag the file onto this browser window and drop it.

Online DBML Text Viewer

Choose your .dbml file to analyze

or drag and drop it here

Online File Viewer

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Programs that open and convert DBML files:

Visual Studio by Microsoft
See the previous paragraphs to learn more about the main application. DBML files are often referred to as Visual Studio developers because this type of file is primarily created or used by this software.
dbml2sql (database schema definition) by Holistics
dbml2sql is a command-line tool for converting a database schema written in DBML (Database Markup Language) to SQL queries. This file format is classified as Developer. Related links: DBML - Database Markup Language
SQL Server Management Studio (database schema definition) by Microsoft
SQL Server Management Studio is an integrated development environment for configuring, monitoring, and managing databases. It leverages .NET framework's LINQ (Language Integrated Query) component to define/document and generate database schemas using a DBML file. This file format is classified as Developer.

DBML format details:

A file format defines how the data in the file is structured. The first characters in a file identify the file format, for example, HTML files start with the bytes <html>. File extension, signature and file format must match; otherwise errors will occur when the file is opened. If there are problems opening a file, you must first determine the file format used. Our analysis of the DBML files produces the following result:

The DBML file extension is rarely used and is used by a few programs, each with its own file format. The file formats most commonly found in DBML files are:

30% of all DBML files use the same file format, which have the signature Table . The content consists of readable text data, which can be read using a text editor. The file size is in the range of 450 bytes to 23 KB. The file type is a fairly new file format. The files contain the following words: Table, varchar, null and integer. Files like these have the following tags: database, diagram and schema.
30% of all DBML files are using the well-known Source file format to store the data. A source code is the set of instructions written by a programmer using a computer programming language like JavaScript, C++ or Basic. This code is translated into machine language by a compiler. The translated result is called app, program or executable. If you open these files in a text editor, you can view and read the content yourself. A typical file size is 12 KB. Several words can almost always be found in the files, e.g. DBML, Table, https, Docs, database and dbdiagram. A usual file name is schema.dbml.

All other DBML files (40%) have no uniform format, the following 4 formats can be found: XML and Project. Often described as data or structure. If you want to find out which format your DBML file belongs to, just click on the button "Choose your .dbml file to analyze".

Technical Data for DBML File Extension

File classification:

Developer

Related files:

frx, res, pri

The following listing is compiled from the database produced by the 'Associate This!' program, selected data from the main FILExt database and file extension information submitted by users.

ProgramID: VWDExpress.ORDesigner.9.0
EXEFile: %ProgramFiles%\Microsoft Visual Studio 9.0\Common7\IDE\VWDExpress.exe

ProgramID: VisualStudio.ORDesigner.9.0
EXEFile: %ProgramFiles%\Microsoft Visual Studio 9.0\Common7\IDE\devenv.exe

ProgramID: VBExpress.ORDesigner.9.0
EXEFile: %ProgramFiles%\Microsoft Visual Studio 9.0\Common7\IDE\vbexpress.exe

a dbml database schema definition is a special file format by Microsoft and should only be edited and saved with the appropriate software.

How to solve problems with DBML files

Associate the DBML file extension with the correct application.
Update your software that should actually open database schema definitions. Because only the current version supports the latest DBML file format. Search, therefore, e.g. on the Microsoft manufacturer website after an available Visual Studio update.
To make sure that your DBML file is not corrupted or virus-infected, get the file again and scan it with Google's virustotal.com.
Click here to open your .DBML file online - secure, fast, and no downloads needed.