Chrome Built-in LLM Chat UI (Prompt API)

A single-file HTML chat app (simple ChatGPT-style UI) that talks to Chrome’s built-in LLM Prompt API and persists conversations in LocalStorage so you can continue chats later.

It includes:

• Multiple chats + chat search
• Per-chat delete in the sidebar + “clear all”
• Markdown rendering for assistant replies (safe, lightweight renderer)
• “Speak” button under the robot icon (Web Speech API / speechSynthesis)
• Export a chat as JSON
• Small footer credit link: “made with ❤️ by Equites.Digital”

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Requirements

This project relies on Chrome’s Built-in AI Prompt API:

• You need a Chrome build/environment where window.LanguageModel is available.
• The API may require enabling Chrome flags / origin trial depending on your setup.
• Run from a secure context (recommended: http://localhost or https://).

If LanguageModel is unavailable, the UI will show an “unavailable” status and won’t be able to run prompts.

Reference: Chrome docs (Prompt API)

• https://developer.chrome.com/docs/ai/built-in-apis#prompt_api