About
Google Hosted Libraries is a content delivery network for popular open-source JavaScript libraries. It serves versioned library files from ajax.googleapis.com so developers can load common dependencies such as jQuery, jQuery UI, D3.js, Bootstrap, and three.js with a stable URL and browser caching.
The service is aimed at web developers who want to include widely used client-side libraries without hosting the files themselves. The page lists specific library versions, HTTPS snippets, CORS and Timing-Allow headers, and a one-year cache policy for CDN assets.
- Versioned JavaScript library hosting
- HTTPS delivery from ajax.googleapis.com
- CORS and Timing-Allow headers
- One-year CDN cacheability
- Popular libraries including jQuery and D3.js
- Library-specific embed snippets
Free Tier Value
This is a public CDN-style offering with no signup, no credit card, and no paid tier on the page. The free access is perpetual and uncapped for the listed libraries, so the practical monthly value is best treated as unbounded rather than compared to a subscription price.
What's included in the free tier
- Access to hosted JavaScript library files via Google’s CDN.
- Access to the listed library versions and exact snippet URLs.
- Access to one-year CDN caching for hosted files.
- Access to CORS and Timing-Allow headers on CDN files.
See Google Hosted Libraries pricing for current limits.
