demo · v137 · origin trial

Data to Prose

From the explainer use-case list: “generate textual explanations of structured data” and “expand pro/con lists into comprehensive evaluations”. Paste a JSON object (e.g. a product spec, a pros/cons table, a calendar event) and the on-device Writer turns it into a paragraph in your chosen tone.

Heads up · origin trial / flagEnable chrome://flags/#writer-api-for-gemini-nano plus the on-device model component. If the API isn't available, the demo falls back to a labelled message.
probing…

structured input

—

generated prose

no output yet

the code

const data = {
  product: "Brompton T-Line", price_gbp: 4490, weight_kg: 7.9,
  pros: ["titanium frame", "ultra-light", "same fold as original"],
  cons: ["very expensive", "single-speed", "no rear rack option"],
};

const writer = await Writer.create({
  tone: "neutral",
  format: "plain-text",
  length: "medium",
  sharedContext:
    "You receive structured product data as JSON. " +
    "Write an evenhanded review paragraph covering price, weight, " +
    "and the pros/cons. Do NOT echo raw field names.",
});

const stream = await writer.writeStreaming(
  "Data:\n" + JSON.stringify(data, null, 2)
);
for await (const c of stream) out.textContent += c;

see also