Security & Threat Intelligence · 30.07.2026, 13:18 UTC
Dogfooding at scale: migrating cdnjs to Cloudflare’s Developer Platform
| Schweregrad | info |
|---|---|
| Kategorie | Security & Threat Intelligence |
| Quelle | Cloudflare Blog ↗ |
| Veröffentlicht | 30.07.2026 UTC |
Sicherheitsmeldung mit Schweregrad noch nicht bewertet. Technische Details im Tab „Originaltext“; empfohlene Schritte in der Checkliste.
As of June 23, 2026, cdnjs, one of the Internet's busiest open-source CDNs, is running exclusively on Cloudflare’s Developer Platform. Along the way, cdnjs surfaced limits in the platform, and the platform grew to meet them.cdnjs is a free, open-source content delivery network for JavaScript and CSS libraries. Instead of using a bundler or self-hosting jQuery, Bootstrap, or Lodash, you drop a <script> tag pointing to cdnjs.cloudflare.com and the library loads from Cloudflare's edge, instantly, anywhere in the world, with no signup, no API keys, and no rate limits. It's the infrastructure behind a significant portion of “intro to JavaScript” tutorials, CodePen demos, and Stack Overflow answers.Community-driven, cdnjs is used on roughly 12% of all websites, a 48.3% share of the JavaScript CDN market. It serves an average of 108,000 requests per second, 9 billion per day, across more than 330 Cloudflare data centers, with a 98.6% cache hit rate. Pretty cool, Internet!In 2011, when bundlers were exotic, npm was barely a year old, and "just drop a <script> tag" was how the web shipped JavaScript, Ryan Kirkman and Thomas Davis built cdnjs as a free, community-run mirror of every popular open-source library. Cloudflare stepped in to host it free of charge months later, and took over project maintenance in 2019. Back then, Cloudflare didn't have a mature Developer Platform that could fully sustain the entire cdnjs ecosystem. Fifteen years and a lot of building blocks later, the platform is mature enough to run cdnjs end to end, on Workers, Workflows, D1, Queues, Workers Cache, R2, …