jsDelivr is a free, open-source CDN that serves files from npm, GitHub, and other sources with automatic integration and on-the-fly optimizations.
The tool solves the problem of reliably distributing open-source files at scale by automatically indexing npm packages and GitHub repositories and serving them through a global network. It uses multiple CDN providers and real user performance data to route requests intelligently, ensuring both speed and uptime. A distinctive feature is its permanent storage of accessed files, which means that even if a package is deleted or a file is removed upstream, jsDelivr continues serving the cached version indefinitely, preventing broken links in production websites.
jsDelivr is built for production use on high-traffic websites with no bandwidth limits or premium tiers. It suits any project that wants to distribute open-source code without managing infrastructure, and it is particularly valuable for libraries and frameworks that need guaranteed availability. The tool's version fallback mechanism automatically serves previous versions when requested files are no longer available, adding another layer of reliability for production deployments.
Almost all open issues are raised by outside users rather than the core team, reflecting a substantial base of adopters reporting real-world use. Maintainers typically respond to new issues and pull requests within a day. Work in the issue tracker is dominated by labels indicating in-progress features, enhancements, and discussions.
