TL;DR - esm.run
- Delivers JavaScript modules on-demand via a global CDN.
- Optimized for modern web browsers, Node.js, and Deno environments.
- Utilizes advanced delivery technologies for high performance and uptime.
Pricing: Free forever
Best for: Individuals & startups
4.3/5 across review platforms
Pros & Cons
Pros
- Simplifies JavaScript module loading without a build step
- Ensures high performance and uptime globally
- Utilizes advanced web delivery optimizations
- Suitable for quick demos and prototyping
- Free to use
Cons
- Currently in beta for production use
- Limited information available on the website beyond core functionality
Ratings Across the Web
4.3(72 reviews)
Ratings aggregated from independent review platforms. Learn more
Key Features
On-demand JavaScript module buildsPermanent storage for built filesGlobal Multi-CDN powered by jsDelivrSupport for modern web browsers, Node.js, and DenoHTTP/2 and HTTP/3 deliveryCode minificationBrotli compressionFine-tuned HTTP caching
Pricing Plans
Free
Free
- A New-Age CDN for JavaScript modules
- Works in modern web browsers, node.js, and deno
- Global Multi-CDN powered by jsDelivr
- On-demand builds with permanent storage
- State-of-the-art delivery (HTTP/2, HTTP/3, code minification, brotli compression, fine-tuned HTTP caching, dependency preloading)
About esm.run
By Toolradar Team·
esm.run is a new-age Content Delivery Network (CDN) specifically designed for JavaScript modules. It allows developers to import modern JavaScript packages directly into their web browsers, Node.js, and Deno environments without needing a build step. The service dynamically builds packages on-demand and stores them permanently for fast future access.
Powered by jsDelivr and its global network of sponsors like Cloudflare, Fastly, Bunny, and GCore, esm.run ensures high performance and uptime worldwide, including mainland China. It leverages state-of-the-art delivery optimizations such as HTTP/2, HTTP/3, code minification, Brotli compression, fine-tuned HTTP caching, and dependency preloading to improve overall performance. It's ideal for quick demos, prototyping, and eventually production use for serving JavaScript modules efficiently.
How we evaluate tools →Source: esm.run
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esm.run FAQ
How does esm.run ensure high performance and uptime globally, including in mainland China?
esm.run is powered by jsDelivr and its sponsors, including Cloudflare, Fastly, Bunny, and GCore. This multi-CDN approach guarantees optimal performance and availability across the globe, extending to mainland China.
What happens to files after they are built by esm.run?
Once a file is built, it is stored in a permanent storage system that is shared by all edge servers. This ensures that subsequent access to these files will always be fast, even if they haven't yet been cached at a specific CDN edge.
What advanced delivery optimizations does esm.run utilize?
esm.run employs state-of-the-art delivery optimizations such as HTTP/2, HTTP/3, code minification, brotli compression, fine-tuned HTTP caching, and dependency preloading. These technologies are used to maximize overall performance.
Can esm.run be used for production applications?
esm.run links are suitable for quick demos or prototyping. While the production feature is currently in beta, it is recommended to use jsDelivr's main domain for production environments once this feature is officially released.
What environments are compatible with JavaScript modules loaded via esm.run?
JavaScript modules loaded through esm.run are designed to work in modern web browsers, Node.js, and Deno environments. This broad compatibility allows for flexible use across different development ecosystems.
Source: esm.run