JSON to TypeScript
Generate TypeScript interfaces and types from sample JSON for faster frontend and SDK work.
About JSON to TypeScript
Infer a first-pass TypeScript shape from real payload samples without switching to a build step or external service. This is useful when exploring third-party APIs, documenting webhooks, or scaffolding a new frontend data model.
Why generate types from JSON?
A sample payload gives you a quick starting point for interfaces and aliases, which is often enough to unblock frontend work. You should still review optional fields and runtime validation needs before treating the generated type as a contract.
Key Features
- Infers nested interfaces and array item types from sample JSON.
- Lets you choose a meaningful root type name before copying the result.
- Produces plain TypeScript that is easy to paste into existing codebases.
- Runs entirely in the browser with no upload step.
How to Use
- Paste a representative JSON sample into the editor.
- Choose a useful root type name such as OrderResponse or WebhookPayload.
- Generate the TypeScript and review it before adding validation or refinements.
Guide
Related Article
JSON to TypeScript Type GenerationHow to infer useful TypeScript types from example payloads without over-trusting a single sample.