⚡ Interactive Client-Side Web AI LabWebMCP + Gemini Nano + WebGPU

browser-native web ai & webmcp playground

Test our production client-side Web AI stack directly in your browser. Inspect and execute live WebMCP tools registered on document.modelContext and declarative HTML forms, probe Chrome Built-in AI (Gemini Nano) APIs with hybrid edge fallback, and run zero-backend WebGPU / Float32 semantic vector search.

Read WebMCP Guide→Read Built-in AI Guide →Agent Discovery Docs

WebMCP Context

Detecting...

Chrome Prompt API

Probing...

Summarizer / Rewriter

Probing...

WebGPU Compute

Probing...

Imperative API (`document.modelContext`)

registerTool()

Select any WebMCP tool registered on this page to inspect its typed JSON Schema contract and execute its in-tab handler with same-origin session locality.

Registered Browser ToolJSON Arguments Payload

Ready

Registered Tool Schema & Annotations

Live Tool Execution Response

JSON-RPC / Structured Result

Click "Execute WebMCP Tool" to run the registered handler in your browser session.

Declarative API (`<form toolname="...">`)

Zero-JS Schema Discovery

This HTML form includes standard W3C WebMCP attributes (toolname, tooldescription, and toolparamdescription) so browser agents can synthesize a tool contract without executing custom scripts.

Auto-Extracted Declarative Tool Contract from DOM

Chrome Built-in AI & Hybrid Edge Router

window.LanguageModel

Run zero-cost, on-device inference via Chrome's LanguageModel or Summarizer API when Gemini Nano is available locally, or test our automatic Hybrid Browser-to-Edge Router fallback.

Built-in Web AI Task APIInput Context / Developer Prompt

Route: Standby

Streaming Output & Hardware Telemetry

0 tokens

Click "Run Inference" to test on-device Gemini Nano or Hybrid Edge fallback.

Chrome Diagnostic Matrix

Client-Side Vector Cosine Similarity Engine

0 Bytes Network Egress

Test client-side semantic retrieval in the browser. Enter a technical query below to compute real-time Float32Array cosine similarity against our pre-indexed Web AI & Architecture corpus right on your device.

Semantic Search Query

Ready

Top-K Local Vector Matches (Cosine Similarity)

Web AI & Agent Architecture Trade-Off Matrix

How modern browser-native AI capabilities compare across latency, privacy, token economics, and ideal production workloads:

Web AI Layer	Browser API / Standard	Network Latency & Cost	Best Production Use Case
WebMCP (Client-Side Agent Tools)	`document.modelContext.registerTool` & `<form toolname>`	0ms IPC / 90% fewer agent tokens	Exposing authenticated in-tab actions (search, filters, checkout, speaker kits) to browser AI assistants without fragile DOM scraping.
Chrome Built-in AI (Gemini Nano)	`LanguageModel`, `Summarizer`, `Rewriter`, `Translator`	0ms RTT / $0 per 1M tokens	Privacy-sensitive drafting, instant article summaries, offline-capable UI helpers, and zero-cost pre-classification.
Client-Side WebGPU / WebNN	`navigator.gpu` + Transformers.js v3 / MediaPipe + OPFS	0ms RTT / Local GPU Shaders	Local 384-d embeddings, client-side RAG over OPFS/IndexedDB, and real-time vision/audio inference.
Hybrid Edge AI Fallback	Firebase AI Logic (Gemini 2.5 Flash) / Cloudflare Workers	120ms to 380ms RTT / Metered API	Fallback for devices without local NPU/GPU weights or complex multi-step reasoning and large context windows.

browser-native web ai & webmcp playground

Imperative API (document.modelContext)

Live Tool Execution Response

Declarative API (<form toolname="...">)

Chrome Built-in AI & Hybrid Edge Router

Streaming Output & Hardware Telemetry

Client-Side Vector Cosine Similarity Engine

Top-K Local Vector Matches (Cosine Similarity)

Web AI & Agent Architecture Trade-Off Matrix

Imperative API (`document.modelContext`)

Declarative API (`<form toolname="...">`)