UNPKG

Web · API

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Freedom report

No signalScore 5.0

Free tierNo free tier on record
Open codeNo open-source code on record
Runs widely1 of 6 device platforms
DocumentedThinly documented

UNPKG is ranked #21 of 29 in CDN software on Freedom251. It runs on API, Web.

Compared on CDN software

Free plan: Yes

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The record

What it does: UNPKG is a fast, global CDN for files published on npm, addressable by package, version, and file path in a URL.
Version resolution: Package URLs can use an exact version, an npm dist-tag, or a semver range; if no version is specified, UNPKG uses the latest tag.
Package exports: UNPKG supports the full package exports spec, including subpaths, and supports custom export conditions through a query parameter.
No-build apps: The site describes loading JavaScript modules directly into browser apps with import maps, without a bundler.
Inline scripts: The /run helper transforms inline TypeScript, JSX, and TSX scripts through esm.unpkg.com and inserts executable module scripts.
Browser modules: esm.unpkg.com can transform TypeScript and JSX, bundle package internals, rewrite dependency imports to pinned UNPKG URLs, and serve modules for modern browsers.
Module options: Browser module URLs support options for target, development mode, export conditions, dependency overrides, aliases, JSX transforms, minification, source maps, metadata, and raw files.
Metadata API: Appending ?meta to a package root or subdirectory returns JSON metadata including file paths, sizes, types, and subresource integrity values.
npm integration: UNPKG mirrors npm packages, and the site says files become available on unpkg.com within minutes of publication to npm.
Cloudflare infrastructure: UNPKG says it runs on Cloudflare's global edge network and Cloudflare Workers, serving requests from hundreds of locations worldwide.
Caching: Files are cached by permanent URLs that include the npm package version; the site recommends full version numbers and file paths for the best chance of a cache hit.
Integrity metadata: The metadata example includes a SHA-256 subresource integrity value for each file.
Project status: UNPKG describes itself as an open source project and says it is not affiliated with or supported by npm.
Support: The site asks users to contact @unpkg with questions or concerns and says not to contact npm for UNPKG help.

Where it ranks on Freedom251

Best CDN Software in 2026#21 of 29

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Sources

unpkg.com· checked 4 Oct 2026