Last updated: May 26, 2026
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Free Tool
JSON to TypeScript Interface Generator
Paste any JSON object and get a fully-typed TypeScript interface in seconds. Handles nested objects, arrays, optional fields, and union types.
InputJSON
OutputTypeScript
// Result will appear here
What this tool does
Typed interfaces from real data
Paste a JSON response from any API and this tool infers the TypeScript interface structure automatically. Nested objects become separate named interfaces, arrays are typed as element arrays, and null values are flagged as optional fields.
When it's most useful
Particularly helpful when consuming third-party APIs that don't ship TypeScript types. Paste the sample response from the docs and immediately get a usable interface to drop into your project.
Copy JSON straight from any website with DivMagic
Use the extension to grab API responses and structured data from any live page, then paste it here.