JSON to TypeScript

What is JSON to TypeScript?

The generator inspects a sample value and writes a matching TypeScript type: strings, numbers, booleans, null, arrays, and nested objects. It describes the sample you provide, so review optional fields and unions before relying on it.

How to use JSON to TypeScript

1. Paste your input into the editor above, or select Sample to load an example.
2. Select Generate types. If the input cannot be processed, a message explains what to fix.
3. Use Copy or Download to take the result with you, and Clear to start again.

Example

Input

{"id":7,"name":"Ada","tags":["admin"]}

Output

export interface Root {
  id: number;
  name: string;
  tags: string[];
}

Practical use cases

• Type API responses
• Draft data models
• Document object shapes

Common problems

• Using an unrepresentative sample
• Assuming generated types validate runtime data
• Forgetting optional fields absent from the sample

Frequently asked questions