JSON from Prose (AI)
Describe data in natural language and get well-formed JSON back.
🔒 Bring-your-own-key — your key is sent only with this request and never stored. Get a key from Anthropic or OpenAI.
About this tool
Describe the data you want — objects, arrays, nesting — and the AI produces well-formed JSON. Bring your own key.
Frequently asked questions
Is the output valid JSON?
Yes — the model returns a single well-formed JSON document; validate it with the JSON Formatter if needed.
Do I need my own API key?
Yes. This tool is bring-your-own-key: paste your own Anthropic or OpenAI key and it is used only for that single request — never stored on our servers.
How much does it cost?
The tool is free; you only pay your AI provider for the tokens used, billed directly by Anthropic or OpenAI on your own account.