--- title: Google Gave Every Chrome a Free AI Model — and a... description: Chrome 148 ships Gemini Nano built into the browser with a public Prompt API accessible from any web page, no API key, account, origin-trial token, server, or... canonical: https://daily.dev/posts/google-gave-every-chrome-a-free-ai-model-and-a-javascript-api-i-built-an-app-with-it-in-27-lines--efabih3ye twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Google Gave Every Chrome a Free AI Model — and a JavaScript API. I Built an App With It in 27 Lines. | daily.dev og:description: Chrome 148 ships Gemini Nano built into the browser with a public Prompt API accessible from any web page, no API key, account, origin-trial token, server, or... og:url: https://daily.dev/posts/google-gave-every-chrome-a-free-ai-model-and-a-javascript-api-i-built-an-app-with-it-in-27-lines--efabih3ye og:image: https://api.daily.dev/og/posts/EFaBIh3ye.png og:image:alt: Google Gave Every Chrome a Free AI Model — and a JavaScript API. I Built an App With It in 27 Lines. og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Google Gave Every Chrome a Free AI Model — and a JavaScript API. I Built an App With It in 27 Lines. **[Noor Mohammad](https://daily.dev/sources/ew9hy5zthevyyefagop4g)** · [@noormohammad](https://daily.dev/noormohammad) · 1 min read · 0 upvotes · 1 comments ## Summary Chrome 148 ships Gemini Nano built into the browser with a public Prompt API accessible from any web page, no API key, account, origin-trial token, server, or per-token billing required, and not gated behind a flag. The model runs entirely on-device, continuing to respond even with DevTools set to Offline. A short demo app of 27 lines is shown along with setup errors encountered and four hard limits developers should expect to hit quickly. ## Content The Mac "hidden AI model" story went everywhere. The bigger version happened in the browser — on ~3 billion machines. Since **Chrome 148**, any page can call **Gemini Nano** through the public Prompt API: no key, no account, no origin-trial token, no build step, no server, no per-token bill. Not behind a flag. Real framing: **the web platform now includes a language model the way it includes a camera API or geolocation.** My 27-line test page kept answering with DevTools set to Offline. Includes the full working page (not a fragment), measured timings, every setup error hit, and the 4 hard limits you'll meet by lunchtime. Video version too. 🔗 [https://medium.com/@thebuildersplaybook/google-gave-every-chrome-a-free-ai-model-and-a-javascript-api-37c185282f04](https://medium.com/@thebuildersplaybook/google-gave-every-chrome-a-free-ai-model-and-a-javascript-api-37c185282f04) ## Community discussion Top comments from developers on daily.dev. **@noormohammad** · 0 upvotes > Two things worth arguing about: (1) availability gating — the model download and hardware eligibility mean you need a real fallback path, so this isn't a drop-in replacement for a server call; (2) the offline behaviour is the genuinely interesting bit for PWAs and privacy-sensitive forms. > > Anyone shipped anything to production on the Prompt API yet? Curious what your fallback strategy looks like for non-eligible clients. > > 🎥 Video walkthrough: [https://youtu.be/a08hMKfVG5s?si=KaL-gWZXnyia8dHb](https://youtu.be/a08hMKfVG5s?si=KaL-gWZXnyia8dHb) ## Similar posts on daily.dev - [Getting Started with Chrome's window.ai Prompt API](https://daily.dev/posts/getting-started-with-chrome-s-window-ai-prompt-api-v9xmcyyfi) · SitePoint · 0 upvotes · 0 comments --- Tags: [#javascript](https://daily.dev/tags/javascript), [#google-chrome](https://daily.dev/tags/google-chrome), [#local-ai](https://daily.dev/tags/local-ai) [View this post on daily.dev](https://daily.dev/posts/google-gave-every-chrome-a-free-ai-model-and-a-javascript-api-i-built-an-app-with-it-in-27-lines--efabih3ye) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"DiscussionForumPosting","mainEntityOfPage":"https://daily.dev/posts/google-gave-every-chrome-a-free-ai-model-and-a-javascript-api-i-built-an-app-with-it-in-27-lines--efabih3ye","headline":"Google Gave Every Chrome a Free AI Model — and a JavaScript API. 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