esm.run
Claim this toolLoad modern JavaScript packages on-demand with global CDN performance.
Free, no paid tier Visit WebsiteThe Bottom Line
- Price
- Free, no paid tier. Compare plans
Key facts
- 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.
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
What is esm.run?
Available on: Web
Ratings Across the Web
esm.run holds an aggregate rating of 4.3 out of 5 from 67 reviews across SourceForge, last checked March 19, 2026.
Ratings aggregated from independent review platforms. Learn more
Key Features
- On-demand JavaScript module builds
- Permanent storage for built files
- Global Multi-CDN powered by jsDelivr
- Support for modern web browsers, Node.js, and Deno
- HTTP/2 and HTTP/3 delivery
- Code minification
- Brotli compression
- Fine-tuned HTTP caching
Pricing Plans
Pricing checked Sep 30, 2026. Source: esm.run, read Sep 30, 2026
| Plan | Price | Details |
|---|---|---|
| Free | Free |
+2 more Show less
|
Is esm.run worth the price?
The pricing for esm.run is exceptionally generous as it offers a fully-featured CDN for JavaScript modules completely free of charge.
There are no paid tiers, making it an outstanding value proposition for any developer or organization needing reliable module delivery. It's best for anyone looking for a robust and free solution for JavaScript module distribution.
esm.run by the numbers
| Metric | esm.run | Peer median | Position (1 is best) |
|---|---|---|---|
| Free plan | Yes | 23 of 34 have one | n/a |
| Listed as an alternative to | 1 tool | 4 | #26 of 34 (joint) |
| User rating | 4.3/5 (across the web, 67 ratings) | 4.4/5 | #12 of 21 (joint) tools with 20+ reviews |
Each position is counted among the tools that have data for that row, as noted under it. All CDN data · How we compute this. Advertising and placement fees are not inputs to any position.
Cite this: Toolradar, “esm.run by the numbers”, Oct 2026.
Reviews
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Across 67 verified user reviews on SourceForge
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esm.run FAQ
How does esm.run ensure high performance and uptime globally, including in mainland China?
What happens to files after they are built by esm.run?
What advanced delivery optimizations does esm.run utilize?
Can esm.run be used for production applications?
What environments are compatible with JavaScript modules loaded via esm.run?
Source: esm.run