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esm.sh vs esm.run: Which is Better in 2026?

Choosing between esm.sh and esm.run comes down to understanding what each tool does best. This comparison breaks down the key differences so you can make an informed decision based on your specific needs, not marketing claims.

Bottom line: esm.run is our overall pick for cdn workflows. Pick esm.sh if you need developer tools.

··Methodology
Editor reviewed0 verified reviews comparedPricing checked May 2026

Short on time? Here's the quick answer

We've tested both tools. Here's who should pick what:

esm.sh

Serve NPM packages as modern ES modules directly in browsers and Deno, no build tools needed.

Best for you if:

  • • You need developer tools features specifically
  • • Serves NPM packages as ES modules directly to browsers/Deno.
  • • Eliminates the need for build tools and local package installations.

esm.run

Load modern JavaScript packages on-demand with global CDN performance.

Best for you if:

  • • You need cdn features specifically
  • • Delivers JavaScript modules on-demand via a global CDN.
  • • Optimized for modern web browsers, Node.js, and Deno environments.
At a Glance
esm.shesm.sh
esm.runesm.run
Starts at
Free
Free
Best For
Developer ToolsCDN
Rating
--

Choose esm.sh or esm.run?

esm.sh

Choose esm.sh if

Serve NPM packages as modern ES modules directly in browsers and Deno, no build tools needed.

  • Simplifies modern web development by removing build steps
  • Provides direct access to a vast ecosystem of NPM packages
  • Optimizes performance through bundling and tree shaking options
  • Your work is developer tools-shaped, not cdn-shaped
esm.run

Choose esm.run if

Load modern JavaScript packages on-demand with global CDN performance.

  • Simplifies JavaScript module loading without a build step
  • Ensures high performance and uptime globally
  • Utilizes advanced web delivery optimizations
  • Your work is cdn-shaped, not developer tools-shaped
esm.sh logo

esm.sh

Serve NPM packages as modern ES modules directly in browsers and Deno, no build tools needed.

Visit Website
TOP RATED
esm.run logo

esm.run

Load modern JavaScript packages on-demand with global CDN performance.

Visit Website
Featureesm.shesm.run
Pricing ModelFreeFree
User RatingNo ratings yet
★4.3/5
72 reviews
Categories
Developer ToolsCDN
CDNDeveloper Tools

In-Depth Analysis

esm.shesm.sh

Serve NPM packages as modern ES modules directly in browsers and Deno, no build tools needed.

Strengths

  • +Simplifies modern web development by removing build steps
  • +Provides direct access to a vast ecosystem of NPM packages
  • +Optimizes performance through bundling and tree shaking options
  • +Supports various module registries for flexibility

Weaknesses

  • -Reliance on an external CDN for module delivery
  • -URL-based configuration can become lengthy for complex setups
  • -Potential for issues if CDN experiences downtime or performance degradation

Key features

Import NPM packages via HTTP URLsSupport for import mapsSupports NPM, JSR, GitHub, and pkg.pr.new registriesOn-the-fly transformation of .ts(x)/.vue/.svelte filesSpecify and alias dependencies via URL query parametersConfigurable bundling strategies (e.g., ?bundle=false, ?standalone, ?raw)
Starts at Free

esm.runesm.run

Load modern JavaScript packages on-demand with global CDN performance.

Strengths

  • +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

Weaknesses

  • -Currently in beta for production use
  • -Limited information available on the website beyond core functionality

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 minification
Starts at Free

Pricing: esm.sh vs esm.run

Planesm.shesm.run
Tier 1N/A
Free
Free

Pricing verified from each vendor's public pricing page. Compare in detail on esm.sh pricing and esm.run pricing.

Who Should Use What?

On a budget?

Both are free. Compare plans on their websites.

Go with: esm.sh

Want the highest-rated option?

Neither has user reviews yet.

Go with: esm.sh

Value user reviews?

Neither has user reviews yet.

Go with: esm.run

3 Questions to Help You Decide

1

What's your budget?

Both are free. Pricing won't help you decide here.

2

What's your use case?

esm.sh is a developer tools tool. esm.run is in cdn. Pick the category that matches your needs.

3

How important are ratings?

Neither has user reviews yet.

Key Takeaways

esm.run

  • Completely free
  • Our pick for this comparison

esm.sh

  • Better fit for developer tools

The Bottom Line

esm.run is our pick.

Frequently Asked Questions

Is esm.sh or esm.run better?

esm.run is rated in our evaluation. Both are free.

What are esm.sh and esm.run used for?

esm.sh: Serve NPM packages as modern ES modules directly in browsers and Deno, no build tools needed.. esm.run: Load modern JavaScript packages on-demand with global CDN performance..

What does esm.sh cost vs esm.run?

esm.sh is completely free. esm.run is completely free. Visit their websites for detailed pricing.

Related Comparisons & Resources

esm.sh Alternativesesm.run Alternativesesm.sh Full Reviewesm.run Full Review
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