Having problems opening a CSS file?

We have programs that can open or convert your CSS files.

Opening CSS files

Did your computer fail to open a CSS file? We explain what CSS files are and recommend software that we know can open or convert your CSS files.

What is a CSS file?

CSS is an acronym for Cascading Style Sheet. Files that contain the .css file extension are used to format the contents of an associated Web page. While the CSS file format is most commonly associated with website pages that have been written in the HTML and XHTML programming languages, the format can also be applied to any type of XML document.

A CSS file contains the properties that define how the HTML elements of an associated Web page will be displayed, such as the color, font, size, line spacing, borders and other HTML elements.

CSS files are similar to template files, allowing users to create multiple websites featuring a similar look and feel without having to create each and every site from the ground up.

Software that will open, convert or fix CSS files

Try a universal file viewer

Try a universal file viewer like Free File Viewer. It can open over 200 different types of files - and most likely yours too. Download Free File Viewer here.

About File Extension CSS

File.org aims to be the go-to resource for file type- and related software information. We spend countless hours researching various file formats and software that can open, convert, create or otherwise work with those files.

If you have additional information about the CSS file format or software that uses files with the CSS suffix, please do get in touch - we would love hearing from you.

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What is a file extension?
A file extension is the characters after the last dot in a file name. For example, in the file name "winmail.dat", the file extension is "dat". It helps Windows select the right program to open the file.
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We help you open your file
We have a huge database of file extensions (file types) with detailed descriptions. We hand pick programs that we know can open or otherwise handle each specific type of file.
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Original downloads only
All software that we list on the file.org website is hosted and delivered directly by the manufacturers. We do not host the downloads, but point you to the newest, original downloads.