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javascriptcsscompressiongzipdeflate

Is there anyway to tell if gzip is in fact compressing specific files?

I know I have gzip running on my server and site. Most everything is taken care of but when I run firebug or google pagespeed, I am told that certain CSS files (hosted by me) are not being gzipped and could be greatly compressed.

Any thoughts are appreciated.

Update

I was asked about my server: MediaTemple DV 3.5 running CentOS 5 with PHP 5.3.2 and Apache 2.2.15

Solution

  • FireBug is great for this purpose. Simply navigate to your site and in the Net tab inspect the Response headers for all requests. For example here's a properly gzipped CSS (on StackOverflow of course):

    enter image description here

    You could also install the YSlow plugin and it will tell you exactly which static resources could be compressed in order to reduce bandwidth.