Gzip Compression

Depends on your server. It might be because your server isn’t offering the feature. I assume you’ve tried adding the necessary details in your htaccess file with no luck which is why you turned to the WordPress Gzip plugin? I’d provide sample code (for htaccess) but i get a sense you did try already.

Do you know what server software is being used? Apache? LiteSpeed? NGINX?

Have you contacted support to see if the server supports gzip output?

Thank you for the response Kimberly!

So i found out our Apache 2 servers actually uses mod_deflate, which calls gzip on the back end automatically. I supposed this might be the issue on why it is incompatible with W3 and why i needed to bring in another plugin?

When you try placing the following into your .htaccess file does gzip still not work?

<ifModule mod_gzip.c>
mod_gzip_on Yes
mod_gzip_dechunk Yes
mod_gzip_item_include file .(html?|txt|css|js|php|pl)$
mod_gzip_item_include handler ^cgi-script$
mod_gzip_item_include mime ^text/.*
mod_gzip_item_include mime ^application/x-javascript.*
mod_gzip_item_exclude mime ^image/.*
mod_gzip_item_exclude rspheader ^Content-Encoding:.*gzip.*
</ifModule>

alternatively, also try:

<IfModule mod_deflate.c>
 AddOutputFilterByType DEFLATE text/html text/xml text/css text/plain
 AddOutputFilterByType DEFLATE image/svg+xml application/xhtml+xml application/xml application/xml-dtd
 AddOutputFilterByType DEFLATE application/rdf+xml application/rss+xml application/atom+xml
 AddOutputFilterByType DEFLATE text/javascript application/javascript application/x-javascript
 AddOutputFilterByType DEFLATE application/x-font-ttf application/x-font-otf
 AddOutputFilterByType DEFLATE font/truetype font/opentype
</IfModule>