🧬 TypeScript to JSON Schema

Paste an interface or object type and get a deterministic JSON Schema draft with required fields, enums, arrays, and warnings for compiler-only TypeScript features.

TypeScript interface or object typeSchema title

TypeScript schema conversion checks

Supports simple interfaces, optional properties, primitive arrays, string-literal unions, and object type literals. Unsupported TypeScript types are preserved as warnings instead of silently pretending to be exact.

Runs in your browser

TypeScript to JSON Schema conversion runs locally in your browser. Unsupported TypeScript features are flagged instead of uploaded or guessed silently.

Include current input in shared/debug payload

What this tool does

TypeScript to JSON Schema converts simple TypeScript object shapes into practical JSON Schema drafts.

Why it is useful

It helps humans and agents avoid retyping field contracts when moving from application types to validation or structured-output schemas.

How it works

The shared core parses interface and object type literals, maps primitives, arrays, and string-literal unions, then emits JSON Schema plus typed warnings.

Best input

Paste one focused interface. Complex generics, intersections, mapped types, conditionals, and imported aliases need a real TypeScript compiler.

Agent workflow tip

Copy the JSON summary when asking an agent to wire a schema into API validation or structured-output prompts.

Privacy note

Browser use is local; the API route submits the snippet to Utilito serverless for automation.

Important limitation

This is not a full TypeScript compiler. Treat unsupported-type warnings as required manual review.

Quick answers

Does it understand imported types?

No. Paste the resolved object shape or use a compiler-backed generator for full-project type graphs.

Does it validate data?

No. It creates a schema draft; use JSON Schema Validator to test data against it.

Common Use Cases

Create a structured-output schema

Convert a small response interface into JSON Schema for an LLM output contract.

Bootstrap API validation

Turn a request type into a first-pass validation schema, then review unsupported warnings.

Agent handoff

Give an agent the schema JSON and warning list instead of a loose TypeScript snippet.

API examples

Call the same deterministic core through Utilito’s compact API router. Send only data you intentionally submit to the server-side endpoint.

Try in API playground →Schema →

Convert TypeScript to JSON Schema with curl

curl

curl -X POST https://utilito.dev/api/run \
  -H "Content-Type: application/json" \
  -d '{"tool_id":"typescript-to-json-schema","input":{"input":"interface LeadCapture {\n  email: string;\n  score?: number;\n  tags: string[];\n  status: 'new' | 'qualified';\n}","name":"LeadCapture"}}'

Convert TypeScript to JSON Schema from JavaScript

javascript

const res = await fetch('https://utilito.dev/api/run', {
  method: 'POST',
  headers: { 'Content-Type': 'application/json' },
  body: JSON.stringify({
    tool_id: 'typescript-to-json-schema',
    input: { input: "interface LeadCapture {\n  email: string;\n  score?: number;\n  tags: string[];\n  status: 'new' | 'qualified';\n}", name: "LeadCapture" }
  })
});
const data = await res.json();
console.log(data.result.output || data.result.report);

Convert TypeScript to JSON Schema from Python

python

import requests
payload = {
    "tool_id": "typescript-to-json-schema",
    "input": {"input":"interface LeadCapture {\n  email: string;\n  score?: number;\n  tags: string[];\n  status: 'new' | 'qualified';\n}","name":"LeadCapture"},
}
result = requests.post("https://utilito.dev/api/run", json=payload).json()["result"]
print(result.get("output") or result.get("report"))

View all in Code →