jsDelivr - A free, fast, and reliable CDN for JS and open source | WarmIndex

jsDelivr is a free, fast, and reliable open-source CDN for delivering JavaScript, CSS, images, and other front-end assets from npm packages and GitHub repositories to web developers worldwide.

🚀 Overview

jsDelivr is a public content delivery network (CDN) that has been operating since 2012, specializing in serving open-source assets with high performance and reliability. It pulls files directly from npm and GitHub, handling version management, minification, and global distribution so developers don't have to worry about hosting or bandwidth.

The project solves the problem of efficient, low-latency delivery of front-end dependencies for websites and apps. Without a service like this, developers would need to self-host libraries or rely on less optimized CDNs, leading to slower load times and higher costs.

It's built for web developers, open-source project maintainers, and teams building modern web applications. The goal was to create a free, optimized CDN tailored for JavaScript and ESM ecosystems, backed by multiple global networks for redundancy and speed.

✨ Key Features

Supports npm and GitHub packages with flexible version ranges, tags, and 'latest' aliasing for easy integration.
Automatic on-demand minification (add .min suffix) and generation of gzip/brotli compressed files.
Multi-CDN architecture with over 540 points of presence, HTTP/3 support, smart load balancing, and 99%+ cache hit ratio.
API for package metadata, usage stats, entry points, and directory listings.
Source maps, dependency preloading, IDE plugins (VS Code, IntelliJ), and tools like Globalping for network testing.
Optional: Custom OSS CDN endpoints and ESM delivery via esm.run.

🛠 Tech Stack

Frontend: JavaScript, SCSS, Vue (in related tools)
Backend: Custom CDN infrastructure, TypeScript, Go (CLI tools)
Database: N/A (uses npm/GitHub APIs)
Auth: N/A
Hosting: Multi-CDN (4 providers), 3 DNS providers, edge caching

👥 Who Is This For?

This project is useful for:

Developers who want to load npm or GitHub assets reliably without self-hosting
Teams looking for high-performance, free CDN with analytics and global reach
Indie makers building web apps needing fast JS/CSS delivery

📸 Screenshots / Demo

Live demo: https://www.jsdelivr.com/
GitHub: https://github.com/jsdelivr

🔥 Project Status

🟢 Actively building

Last updated: 2026-03-24

❓ FAQ

Is this project free?

Yes (completely free for open-source projects). No costs for usage, unlimited bandwidth.

Is the source code available?

Yes — https://github.com/jsdelivr/jsdelivr (main repo) and https://github.com/jsdelivr (organization with tools like data.jsdelivr.com, globalping)

Can I contribute?

Yes — open issues and PRs on GitHub repos (e.g., help wanted labels, Hacktoberfest), or sponsor via https://www.jsdelivr.com/become-a-sponsor. Join Discord community.

📬 Contact & Links

Built with ❤️ and kept warm on WarmIndex.

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