JSON to TypeScript Effect Schema Converter

How to use

1. Paste JSON input from your API payload or sample document.
2. Select your output target and model options.
3. Generate, review, and copy the result.

Benefits

• Handles nested objects and arrays from API responses.
• Reduces manual model writing and naming inconsistencies.
• Works instantly in browser with copy-ready output.

Best use cases

• Generate runtime schemas for Effect-based validation and decoding flows.
• Keep schema definitions close to Effect-powered request and response pipelines.
• Reuse generated schemas where static typing alone is not enough for external JSON input.

Type mapping notes

• Objects map to Schema.Struct definitions.
• Primitive values map to Effect Schema scalar constructors.
• Array values map to array schema helpers with inferred nested item schemas.

Implementation tips

• Choose this route when your TypeScript stack already uses Effect runtime utilities.
• Keep generated schemas near API boundary code where decoding actually happens.
• Review optional and nullable fields carefully when payloads are sparse or evolving.

Sample JSON

{
  "id": 101,
  "name": "Ada Lovelace",
  "active": true,
  "roles": ["admin", "editor"],
  "profile": {
    "email": "ada@example.com",
    "score": 9.8
  }
}

Sample output

import { Schema } from "effect";

export const UserModelSchema = Schema.Struct({
  id: Schema.Number,
  name: Schema.String,
  active: Schema.Boolean
});

FAQ