{ }JSONQuick
JSON to TypeScript
Generate TypeScript interfaces from sample JSON data. Copy-paste ready type definitions.
About this tool
Paste JSON data and get TypeScript interface definitions that match the structure. This is one of the most common tasks in TypeScript development — taking an API response and creating the types you need to work with it safely. The generated interfaces include proper typing for strings, numbers, booleans, arrays, and nested objects.
FAQ
Should I use interface or type for JSON data?
Interfaces are generally preferred for data shapes because they are extendable and produce better error messages. Use type aliases for unions, intersections, and utility types.
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