JSDelivr is a free public CDN for open-source projects. Supports npm, GitHub, WordPress, Deno, and more. jsDelivr is a public, open-source CDN (Content Delivery Network) developed by ProspectOne, focused on performance, reliability, and security. JSDelivr (stylized as jsDelivr) is a free public CDN for open-source projects. JSDelivr is a special kind of CDN. This is where jsDelivr comes into play.