// Design the Schema structure，then choose a target language to generate codeJSON Designer
JSON Designer helps you model a JSON object visually before you write API examples, fixtures or data contracts. Add fields, choose types, mark required properties and inspect the generated example JSON. It is useful when you need to sketch an API response, review nested structures with teammates or create a starting point for generated models.
Privacy note: All processing happens in your browser — your data never leaves your device.
How to use
Start with the root object, add child fields and choose the field type. Use arrays for repeated values and nested objects for structured data. The example panel updates as the schema changes, so you can quickly see whether the shape matches the payload you want to send or document.
Example: Example: create a User model with id, email, displayName and an array of role strings, then copy the generated JSON example into an API document.
FAQ
Is this a full JSON Schema validator?
No. It focuses on visual structure design and example generation for everyday API work.
Can I model nested objects?
Yes. Add object fields and then add child fields inside them.
Does it store my schema remotely?
No. The English page keeps the workflow local to the browser.