JSON Schema, TypeScript & Zod Generator
Validate, format, and instantly convert raw JSON into TypeScript interfaces, Zod validation schemas, JSON Schema (Draft-07), Python Pydantic models, and Go structs. 100% local-first in your browser.
🌐 JSON Schema & Multi-Language Generation Guide
Standard Draft-07 Specification
Outputs standard Draft-07 JSON Schema with $schema, title, type, properties, and automatically identified required field arrays.
OpenAPI & Swagger Compatible
The generated JSON Schema objects map directly into OpenAPI 3.0 and 3.1 requestBody and response schema definitions.
Production Validator Integration
Tested for immediate compatibility with popular JSON schema validators including Ajv (JavaScript/TypeScript), jsonschema (Python), and gojsonschema (Go).
Multi-Language Polyglot Exports
Switch between TypeScript interfaces, Zod runtime schemas, Python Pydantic models, and Go structs with a single click.
Interactive Format & Minify
Quickly format or minify messy JSON payloads, sort keys alphabetically, and fix trailing commas and unquoted keys before generating schemas.
Zero Data Transmission
Runs 100% in-browser with zero telemetry. Ideal for confidential customer data, financial transactions, and proprietary database schemas.
❓ Frequently Asked Questions
What is the difference between JSON Schema and TypeScript interfaces?
TypeScript interfaces only exist during development to help IDEs check code types. JSON Schema is a language-agnostic standard (stored as JSON) used by backend validators like Ajv, database engines (PostgreSQL, MongoDB), and API documentation tools (Swagger/OpenAPI) to validate data across any programming language.
Which JSON Schema draft version does this generator use?
Our generator outputs Draft-07 by default, which is the most widely supported standard across enterprise tooling, Swagger/OpenAPI 3.0, and high-performance validation libraries like Ajv.
Can I use the output to validate incoming HTTP requests in Node.js?
Yes. You can pass the generated JSON Schema directly into Ajv (npm install ajv) to validate incoming Express, Fastify, or NestJS request payloads with sub-millisecond compiled validation functions.