API Response Playground
Explore any JSON API response with a beautified view, collapsible tree, search, copy and download — then generate TypeScript, Python, Java and C# models.
export interface ApiResponse {
user: User;
roles: string[];
meta: Meta;
}
export interface Meta {
page: number;
total: number;
}
export interface User {
id: number;
name: string;
active: boolean;
}How to use API Response Playground
- 1Paste the response
Drop a JSON API response into the editor — invalid JSON is reported with the exact parser error.
- 2Explore it
Switch between the collapsible tree view and the beautified view, and search keys or values to highlight matches.
- 3Generate models
Choose TypeScript, Python, Java or C#, set a root model name, and get typed classes or interfaces for the whole payload including nested objects.
- 4Copy or download
Export the formatted JSON or the generated models straight to your clipboard or a file.
Common use cases
- Turning a live API response into typed client models
- Exploring a deeply nested payload without scrolling raw JSON
- Finding which key holds a value you saw in a log
- Sharing a beautified response with a teammate
API Response Playground FAQ
Which languages can it generate models for?
TypeScript interfaces, Python dataclasses with typing hints, Java classes with private fields, and C# classes with auto-properties.
How are nested objects handled?
Every nested object becomes its own named model derived from the key name, and arrays are typed from their first element.
Does it work with an array at the top level?
Yes. The first element of a top-level array is used as the shape for the generated model.
Is the payload sent to a server?
No. Parsing, searching and code generation all run in your browser, so production API responses stay on your machine.
Looking for something similar? Browse all developer tools on Easutil →