How to open CSS file extension?

The author of advice: Mr Brankiewicz

CSS files are incessantly popular. However, a file name containing CSS file extension is problematic for some of the users. They have problems with correct opening of a file with CSS extension. However, it should be remembered that CSS file extension can match one or more types of files. The most popular is Cascading Style Sheets Format but if there are others, you will find information concerning them below.

So, it is worth looking close at the problem concerning CSS files and search for its solution.

A list of programs supporting files types with CSS extension can be found below. Applications are sorted according to appropriate operational systems and their popularity.

  • Cascading Style Sheets Format

    .css file extension

    Category: Internet Files

    OS Software
    Windows Adobe Dreamweaver CS5 Adobe Dreamweaver CS5
    Adobe ColdFusion Builder Adobe ColdFusion Builder
    Microsoft Visual Studio 2010 Microsoft Visual Studio 2010
    Microsoft Notepad Microsoft Notepad
    MAC OS Adobe Dreamweaver CS5 Adobe Dreamweaver CS5
    Adobe ColdFusion Builder Adobe ColdFusion Builder
    Apple TextEdit Apple TextEdit

How to check if a file we want to open is not infected by malware or viruses?

  • Download Malware/viruses removal tool from CSS files in the Windows system.
  • Click “Start scanning” and wait until the programme performs the scanning process on your computer.

What are the reasons of errors concerning CSS extension of files?

The problem that often causes damage concerning CSS extension are Windows system registry errors. That is why, in the first place it is recommended to:

  • Scan computer in order to identify, repair and open the CSS file
  • Check system registry from the angle of hidden errors
  • Repair file’s associations with programs in the system registry

If you are not sure if the above problems concern you, you should consider other frequent irregularities:

  • You do not have an appropriate application installed that supports CSS file extension
  • CSS file is corrupted
  • The application’s version necessary to open the file is not correct
  • The file is not assigned to an appropriate program

Solving problems with CSS files


If CSS file does not open, firstly, it is worth using files associations built in the Windows system with application that can support them. In order to do it, you should double-click a CSS file icon. A list of programs that probably support such a file will appear. It is enough to choose one of them so that Windows would open a given extension with it. Incorrect file’s association will result in Windows trying to open CSS file with a wrong program all the time even if there is an appropriate application supporting this format on a drive. In this case, it is necessary to perform the above mentioned registry scanning and associations’ repair.

If associations are correct and Windows still cannot open the file, most probably the computer does not have appropriate software supporting files with name containing CSS in their extension. The solution to this problem is very simple. You should buy or download a free (if they exist) application that will allow you to open, browse and edit CSS format (You can also try to find more informations on FileInfo). It is no risk because many paid programs have free test versions enabling to check their functionality.

Do you have extra information about a CSS file? [ Add information about a CSS file ]

5 564

of file extensions

8 858

of file types

5 504

of applications opening the files

1 661

of producers