How can I tell if my server is serving GZipped content?

Question

I have a webapp on a NGinx server. I set gzip on in the conf file and now I\'m trying to see if it works. YSlow says it\'s not, but 5 out of 6 websites that do

Answer 1

See in the response headers. In FireFox you may check with Firebug.

Content-Encoding    gzip

If server supports gzip content then this should be displayed.