cdnjs review
A focused, free CDN for delivering curated web libraries through Cloudflare’s network.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
cdnjs is a free, open-source, community-driven content delivery network for commonly used JavaScript, CSS, and font resources. It is aimed at web developers who want to include hosted libraries with script or link tags, without a build step or npm installation. The single Free plan provides open-source library assets and global delivery through Cloudflare’s network. Its web and API access make it suitable for direct browser inclusion as well as programmatic queries.
The product’s strongest fit is its focused delivery workflow. Developers can select resources from a curated catalog and include them directly in web pages. cdnjs supports HTTP/2, HTTP/3, QUIC, HTTPS, Brotli, and GZIP, while Subresource Integrity hash generation adds a way to verify included resources. Automatic library updates from npm and GitHub help keep catalog entries connected to their upstream sources. An unauthenticated API is also available for querying cdnjs, and npm and GitHub are part of its surrounding ecosystem.
cdnjs should appeal to teams that need straightforward public delivery for established JavaScript, CSS, and font libraries, particularly when avoiding a build step is useful. Its open-source model and free pricing keep the offering simple, but its scope is deliberately narrow. This is a library CDN rather than a broad delivery platform: it does not target video delivery or edge compute, and its catalog is centered on curated web assets. Choose cdnjs for common front-end resources and direct inclusion; choose a broader CDN when your requirements extend beyond those asset types.
cdnjs pros and cons
- Where it wins
- Global delivery through Cloudflare’s network
- HTTP/2, HTTP/3, QUIC, Brotli, and GZIP support
- Automatic updates and Subresource Integrity hash generation
- Where it doesn't
- Limited to JavaScript, CSS, and font library assets
- Not designed for video delivery or edge compute
- Catalog scope is narrower than a general-purpose CDN
cdnjs fact sheet, pricing and score →
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