There are 4 other file types using
the DLL file extension!

dll file icon.dll - Google Chrome theme

dll file icon.dll - Virtumonde / Vundo Trojan infected file

dll file icon.dll - Microsoft DLL dynamic web page file

dll file icon.dll - FSociety ransomware affected file

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DLL file extension - Dynamic Link Library

What is dll file? How to open dll files?

File extension dll is commonly used for so called dynamic-link libraries, modules that contain data and other functions that can be linked to another module, for example executables.

Many Windows apps and even Windows use .dll files to store runtime routines. You can find who created any DLL file by right clicking on the file and choosing Properties, and then selecting the Version tab.

DLL format generally have two functions, i.e. exported functions and internal functions. 

  • Exported functions are intended to be called by other modules, as well as from within the DLL where they are defined.
  • Internal functions however, are typically intended to be called only from within the DLL where they are defined.

Last but not least, some .dll files may also contain program icons.

Various virus and malicious programs often inject .dll files to infect computers when executed. So always be mindful when executing unknown programs.

MIME types:
application/x-msdownload
application/x-msdos-program

The default software associated to dll file type:

Microsoft Windows icon

Microsoft Corporation logo Microsoft Windows  Microsoft Windows software

Company or developer:
  Microsoft Corporation

Microsoft Windows is a family of operating systems developed by the Microsoft Corp.. The first Windows was released in 1985 as a GUI add-on to MS-DOS.  MS-DOS based Windows versions were developed to 2000, when was released the last version called Windows ME. Windows based on NT core started in 1993. Windows NT family are developed to these days, the latest version is called Windows 10.

Microsoft Visual Studio icon

Microsoft Corporation logo Microsoft Visual Studio  Microsoft Windows software

Company or developer:
  Microsoft Corporation

Microsoft Visual Studio is an integrated development environment (IDE) used to create applications for Microsoft Windows, Windows Mobile, .NET Framework, Silverlight as well as dynamic websites and web applications.

IconsExtract picture or screenshot

IconsExtract  Microsoft Windows software

Company or developer:
  Nirsoft

The IconsExtract utility scans the files and folders on your computer, and extract the icons and cursors stored in EXE, DLL, OCX, CPL, and in other file types. You can save the extracted icons to ICO files (or CUR files for cursors), or copy the image of a single icon into the clipboard.

Related articles:

Extract icons

How to change default file extension icon in Microsoft Windows

Help how to open DLL files:

There is no way you can open or access .dll files manually, you would have to decompile them using some IDE before you can access the data.

Some programs can be used to explore .dll files and extract icons, but that's it.

How to convert file with extension DLL:

DLL format generally is not suitable to be converted to anything else. However, some dll files contains icons which can be extracted with suitable program.

Find conversions from dll file:

dll to ico

dll to icon

File identification strings:

HEX code: 4D 5A
ASCII code: MZ

Related links:

Dynamic-Link Libraries full overview

List of software applications associated to the .dll file extension

Recommended software programs are sorted by OS platform (Windows, Mac OS X etc.) and possible program actions
that can be done with the file
: like open dll file, edit dll file, convert dll file, view dll file, play dll file etc. (if exist software for corresponding action in File-Extensions.org's database).

Hint:
Click on the tab below to simply browse between the application actions, to quickly get a list of recommended software, which is able to perform the specified software action, such as opening, editing or converting of the dll files.

  • Open dll file
  • Save dll file
  • Edit dll file
  • View dll file
  • Create dll file
  • Import dll file
  • Export dll file
  • Extract dll file
  • Others dll file

Software that open dll file - Dynamic Link Library

Click on the link to get more information about listed programs for open dll file action.

Microsoft Windows:

Main software associated with dll file by default:
Microsoft Visual Studio small icon Microsoft Visual Studio
IconsExtract
Other suggested software:
ResEdit

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