It&#x27;s not immediately clear what this <i>does</i> do your HTML&#x2F;CSS files. It&#x27;s sort of hinted at in the logo image, but the (many) examples would be much more helpful if some sample input and output text were provided.<p>I&#x27;m not convinced the use case of sticking CDNs in front of URLs is broad or complex enough to justify bringing in another tool (e.g. I&#x27;m pretty sure Rails does this out of the box). That said, I could see this growing into a general-purpose URL transformer.