mod_deflate
In Linux systems, mod_deflate can compress HTTP content before it is served to the client; this results in faster network transfers.
Compressing Content
Apache 2.0, 2.2, and 2.4 allow you to compress content using mod_deflate before sending it to the visitor's browser. The types of content to be compressed are specified by MIME type. The mod_deflate module provides similar functionality to mod_gzip.
Mod_deflate is available on all our Linux-based hosting packages, including Shared, Reseller, VPS, and Dedicated Server plans.
You can enable or disable it in your cPanel by doing the following:
- Log in to cPanel.
- In the Software section, click on Optimize Website.
- Under Compress Content, select the appropriate option:
- To disable compression of your website's content, choose Disabled.
- To compress all of your website's content, select Compress All Content.
- To specify a list of types of content to compress, select Compress the specified MIME types. Enter a space-separated list of the types of content that you wish to compress in the MIME Types text box (for example, text/html, text/plain, text/xml).
- For example, do not include any image file formats in the list, such as .jpg and .png. These are already compressed data.
- Apache will compress PHP content if you enable zlib.output_compression setting in the MultiPHP INI Editor interface of cPanel.
- Click Update Settings.
Additional Information
To learn more about the mod_deflate module, read the documentation for your server's version of Apache:
- Apache 2.0 web server documentation for mod_deflate.
- Apache 2.2 web server documentation for mod_deflate.
- Apache 2.4 web server documentation for mod_deflate.
In addition, the following resource from GTmetrix is helpful for understanding which rules to put in place: