AI JSON Schema generator — describe your data, get a schema
Describe your data in plain English and get a valid JSON Schema (draft 2020-12). This is a bring-your-own-key AI tool. It works with your own API key — and Groq and NVIDIA give free keys, so you can use it at no cost. Your key is stored only in this browser; your text is sent to your chosen provider through our server, which never logs or stores your key or text. It runs on the provider's servers, so it is not on-device.
How to use it
- Add an AI key in the key bar (free from Groq or NVIDIA; also Anthropic, OpenAI or xAI).
- Paste your text and pick any options.
- Press the button — the result comes back from your chosen AI. Copy or Download it.
FAQ
How does it work?
Describe the shape of your data — fields, types, nested lists — and the AI returns a JSON Schema plus a note on any assumptions. Review it before using it in validation.
Is my description kept private?
Your key lives only in this browser. Each request sends your text and key to your chosen provider through our server, which never logs or stores either. We keep no copy — but the provider processes your text under their terms.
Where do I get a free API key?
Groq (console.groq.com) and NVIDIA (build.nvidia.com) both offer free keys — no card needed. Paste one into the key bar once and it is remembered on this device. Anthropic, OpenAI and xAI keys work too.
Limits
The AI infers types and required fields from your words; check them against your real data before relying on the schema.
Related
Generate matching sample data with the mock-data tool, or validate JSON with the JSON tools.
Your key stays in this browser. Manage or clear all keys any time in Settings.