A dll file extension is associated with the Microsoft IIS Web server and used for dynamic web pages.
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.DLL file extension - Microsoft DLL dynamic web page
What is dll file? How to open dll files?
The dll file extension is used for web pages dynamically generated by Microsoft IIS Web server.
The dll file contains server-side scripts, such as Perl or VB scripts that generate the HTML for the Web page.
The dll file extension is much more used for Dynamic Link Library files.
Updated: April 18, 2024
The default software associated to open dll file:
Microsoft Internet Information Services 
Company or developer:
Microsoft Corporation
Microsoft Internet Information Services (IIS) is web server application distributed with Microsoft Windows Server as well as some editions of Microsoft Windows. IIS supports HTTP, HTTPS, FTP, FTPS, SMTP and NNTP protocols.
List of software applications associated to the .dll file extension
Recommended software programs are sorted by OS platform (Windows, macOS, Linux, iOS, Android 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 dll files.
Software that open dll file - Microsoft DLL dynamic web page
Programs supporting the exension dll on the main platforms Windows, Mac, Linux or mobile. Click on the link to get more information about Microsoft Internet Information Services for open dll file action.
