Uses Chrome's built-in window.LanguageModel API (Gemini Nano, runs entirely on-device). No API key, no network calls.
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Setup: Chrome 127+ with the flag chrome://flags/#prompt-api-for-gemini-nano enabled. The model downloads (~1–2 GB) on first use.
Note: Gemini Nano is small and may struggle to produce well-formed HTML for complex prompts. Best results on short, focused requests.