CDN can be really costly. It is not possible for all to afford own paid CDN. Purely free CDN accounts are not exactly great by performance. Here are Some Free CDN For WordPress Powered Small Websites Using Them in a Tricky Way Will Leverage Page Speed and Lessen Server Load. These CDNs are not normally used by the mass free CDN for WordPress mob. The biggest challenge is 
integrating them with your existing website.
Free CDN For WordPress Powered Small Websites : Understanding the Limitations
We are talking about using the enterprise grade CDN which are given for free to the developers. Their hosted files perform like the paid CDNs. When you are not paying anything, it is obvious that, you have to compromise by one of these two ways :
- Whole website’s various contents by a free CDN provider. Known example is combined service by CloudFlare at free level. It is not great in 2016 anymore. CloudFlare free was great in 2011 era, users were lesser. We are not talking about this option. Photon by Jetpack aka WordPress is not great about speed.
- Using code to integrate some common free CDN services for certain types of files. For example, jQuery to various common images.
You can use Base64 Data URI to make image to non-image. Rest remaining is a custom CSS or few custom Javascript. They can be inlined with WordPress plugins. What can not be transferred to free CDN is custom logo, custom favicon, post image etc.
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Free CDN For WordPress Powered Small Websites : Understanding the Limitations
For using the free CDN For WordPress one need a clear cut blueprint and implement them via php snippets. For example, SwarmCDN’s free plan is limited by bandwidth, look at their website’s pricing.
Now look at JsDeliver, many WordPress Plugins, Themes has project on JsDeliver. For example, WordPress Plugin has the available Js, CSS – http://www.jsdelivr.com/projects/syntaxhighlighter
They have Multi-CDN Load balancing. It is even great than many paid CDNs. In that case, you need rewriting the path of each file with PHP snippet. Other such small amount of free or unlimited free for few types of files is provided by :
Free CDN For WordPress By Stealing Other’s Common Resources
Small to medium website will block any kind of stealing of their paid CDN with integrated service by the providers. If you are thinking to use our CDN – you can not see but we may do more worser work – pushing JavaScript malware.
But very large websites usually need to use their own CDN with wildcard to allow own various departments. For that reason basically Microsoft, Google makes the “stealing” officially valid by offering libraries.
We will not tell you the name of such bigger websites who actually use WordPress and thereby, whole wp-includes, wp-admin‘s static content can be used with their CDN url. Still, Hewlett Packard and IBM are commonly used for “stealing”. Reason is obvious – they have own millions of servers and factually it does not matter if the whole earth use their one JavaScript from CDN. If you can find HTTP url of CDN that is safer because HTTPS allows more ways to block. Google’s Blogspot has lot of images, themes – they can be used.
As can be expected, these solutions are not suitable for a professional grade website.
