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Ask a model for structured JSON

Get a model to answer in strict JSON that a program could read.

Prices, plans and screens change. This tool was last checked on 2026-10-15. Use the official site if a step looks different.
Open Official Tool

Before you start

A Google account. About 15 minutes.

Setup

  1. Open the official site with the Open Official Tool button and sign in.
  2. Start a new prompt (a blank chat or prompt box).
  3. If the tool lets you choose a model, pick any current general model.

Exercise

Paste this prompt, then press run:

You extract details from a support message.
Reply with JSON only, no extra words, using exactly these keys:
"customer_name", "issue", "urgency" (low, medium or high).

Message: "Hi, this is Ravi. My invoice shows the wrong amount and I need it fixed before Friday."

Expected result

A single JSON object, for example:

{"customer_name": "Ravi", "issue": "Invoice shows the wrong amount", "urgency": "high"}

The wording can differ. The three keys must be present and nothing else should surround the JSON.

Check your result

Troubleshooting

  • Extra words around the JSON: add "Reply with JSON only" again and show an example.
  • Wrong keys: repeat the exact key names in the prompt.
  • Different results each run are normal. Improve the instructions, not the luck.

Security notes

Use made-up messages only. Never paste real customer data, passwords or API keys.

Challenge

Add a fourth key, "next_step", and make the model refuse to guess when the message has no clear issue.

Before you finish

Please log in to save your progress.