Is Having Css On One Line More Optimized

CSS Programming

As a web developer, I am always seeking ways to optimize my code for better performance. One common debate in the development community is about whether having CSS on one line is more optimized than having it on multiple lines. Let’s delve into this topic and explore the potential pros and cons.

The Case for CSS on One Line

Having CSS on one line can reduce the file size of the CSS document. When the code is compressed, spaces and line breaks are removed, resulting in a smaller file size. This can lead to faster load times, especially on websites with a large amount of CSS.

The Case for Multiple Lines of CSS

On the other hand, having CSS on multiple lines can improve readability and maintainability. It is much easier to navigate through and make changes to the CSS when it is well-formatted and organized. This can be especially beneficial when working in a team or revisiting the code at a later date.

Consideration of HTTP/2

With the advent of HTTP/2, the significance of file size reduction has diminished to some extent. HTTP/2 allows multiple files to be sent in parallel over a single connection, which means that the number of requests matters more than the file size. In this context, the readability and maintainability of the code may take precedence over file size optimization.

My Personal Take

After experimenting with both approaches, I tend to lean towards having CSS on multiple lines. While file size optimization is important, especially for older websites and lower bandwidth connections, I find that the benefits of readability and maintainability outweigh the marginal gains in file size reduction, especially with the advancements in network protocols.


In conclusion, the decision between having CSS on one line or multiple lines ultimately depends on the specific needs and priorities of the project. For me, prioritizing readability and maintainability makes the code more sustainable in the long run. It’s important to consider factors such as network protocols, the size of the CSS file, and the collaborative nature of the project when making this decision.