Free CDN for popular JavaScript libraries
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Reviews onG2
1 review trackedThe Bottom Line
Entry price
Free, no paid tier
Biggest pro
Free CDN for libraries
Biggest con
Dependency on third party
TL;DR - cdnjs
- cdnjs is a free CDN that hosts popular JavaScript and CSS libraries for faster website loading
- It provides instant access to thousands of open-source libraries with automatic optimization
- Completely free to use, powered by Cloudflare infrastructure
Pricing: Free forever
Best for: Individuals & startups
What is cdnjs?
cdnjs hosts popular JavaScript libraries on a free, fast CDN. Instead of bundling common libraries or paying for hosting, link to cdnjs and get reliable, cached delivery worldwide.
The library catalog covers most frontend dependencies. SRI hashes enable integrity verification. The network is fast globally.
Developers building websites who need common libraries choose cdnjs for free, reliable hosting of frontend dependencies.
Available on: Web
Pros & Cons
Pros
- Free CDN for libraries
- Huge library collection
- Good performance
- Easy to use
- Community driven
Cons
- Dependency on third party
- Version availability varies
- No SLA
- Security considerations
- Self-hosting often better
Ratings Across the Web
5(1 reviews)
Ratings aggregated from independent review platforms. Learn more
Key Features
CDNJavaScript librariesCSS frameworksFreeCloudflare backedOpen source
Pricing Plans
Pricing checked Jun 9, 2026
Most Popular
Free
Free
Public CDN
- Free JS libraries
- Cloudflare-backed
- Global edge
- No signup
Reviews
$99Free with your review
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cdnjs FAQ
How does cdnjs help developers with website performance?
cdnjs hosts popular JavaScript libraries on a free, fast CDN, allowing developers to link to common libraries instead of bundling them. This provides reliable, cached delivery worldwide, which can improve website loading times and overall performance.
Which teams benefit most from using cdnjs?
Teams building websites that require common frontend dependencies can benefit from cdnjs. It offers a free and reliable hosting solution for these libraries, making it suitable for projects looking to optimize delivery without incurring hosting costs.
How is cdnjs priced?
cdnjs is entirely free to use, with no paid plans required. It provides its service of hosting popular JavaScript libraries on a CDN without any associated costs for developers.
Can cdnjs be used to verify the integrity of hosted libraries?
Yes, cdnjs supports Subresource Integrity (SRI) hashes, which enable integrity verification for the JavaScript libraries it hosts. This allows developers to ensure that the files delivered have not been tampered with.
What kind of trade-offs should be considered when using cdnjs?
When using cdnjs, developers should consider the dependency on a third party and that version availability can vary for some libraries. Additionally, it does not offer a Service Level Agreement (SLA) and has security considerations, with self-hosting often being a better option for critical applications.
How does cdnjs compare to jsDelivr for hosting JavaScript libraries?
cdnjs, like jsDelivr, provides a free CDN for popular JavaScript libraries, offering a vast collection and good performance. Both services aim to deliver frontend dependencies reliably, though specific library availability or network performance might differ between them.
Source: cdnjs.com