JSON Viewer

Developer Suite

JSON to TypeScript Converter

Paste any JSON object or API response and instantly get a clean TypeScript interface — plus an optional Zod validation schema. Runs entirely in your browser, nothing is uploaded.

Input JSON
Output
// Output will appear here...
Also need to convert an API call? Try the cURL to Code converter. Open cURL → Code

About the JSON to TypeScript Converter

This tool reads the structure and value types of any JSON object and generates a matching TypeScript interface — including nested objects as separate named interfaces, arrays typed from their first element, and optional fields where applicable. It pairs naturally with the JSON Viewer and JSON to Excel tools on this site: paste a messy API response in the main viewer, fix it, then bring it here to generate types for your frontend.

Why also generate a Zod schema?

A TypeScript interface only checks types at compile time. A Zod schema validates the same shape at runtime — useful when you don't fully trust an external API response. Toggle to the Zod tab to get both from the same JSON input.