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The pagespeed tool says

Compressing could save 95.0KiB (66% reduction).

but when I test for GZIP it shows that it works.

I have my htaccess and conf files setup correctly (i think).

How can I verify? Is the pagespeed tool wrong? How to I make this work?

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The page in question is –  Kirk Strobeck May 18 '12 at 19:47

2 Answers 2

See web server response headers using firebug in firefox or developer tools in chrome:

If resource is gzipped you will see header:


You can also use any CLI web clients, e.g. wget:

wget -S -O /dev/null 

It doesn't show content-encoding, but if you use

wget --header='Accept-Encoding:gzip,deflate,sdch' -S -O /dev/null` 

Connecting to connected.

HTTP request sent, awaiting response... 
  HTTP/1.1 200 OK
  Date: Fri, 18 May 2012 19:51:12 GMT
  Server: Apache
  Last-Modified: Fri, 18 May 2012 19:42:04 GMT
  Accept-Ranges: bytes
  Cache-Control: max-age=31536000
  Expires: Sat, 18 May 2013 19:51:12 GMT
  Vary: Accept-Encoding
  Content-Encoding: gzip   <================================ Look here
  X-Powered-By: PleskLin
  Connection: close
  Transfer-Encoding: chunked
  Content-Type: application/javascript; charset=utf-8
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Right, I don't see it on here –  Kirk Strobeck May 18 '12 at 19:46
I've tested your url with wget -S -O /dev/null It doesn't show content-encoding. but when I use wget --header='Accept-Encoding:gzip,deflate,sdch' -S -O /dev/null content-encoding is set properly and response size is smaller. so, your mod_gzip is set up properly –  DukeLion May 18 '12 at 19:53
Thank you!! it turns out my company network somehow prevents that header. Thank you! –  Kirk Strobeck May 18 '12 at 20:15
If you can please edit your answer to reflect the comment, i will award –  Kirk Strobeck May 18 '12 at 20:16
@KirkStrobeck Many corporate proxy servers don't support compressed encoding as they'd have to decompress and recompress that content to filter/scan/classify it. –  Chris S May 19 '12 at 2:07

Add this to .htaccess

<Files *.js.gz>
ForceType text/javascript
Header set Content-Encoding: gzip
<Files *.css.gz>
ForceType text/css
Header set Content-Encoding: gzip
<Files *.html.gz>
ForceType text/html
Header set Content-Encoding: gzip
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