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Convert TypeScript interface definitions and Zod schemas into W3C JSON Schema (Draft 7 / 2020-12) with 100% browser-local privacy.
100% browser-local compiler. Convert Zod & TS types to Draft 7, Draft 2020-12, OpenAPI, or OpenAI Tool Specs.
{
"$schema": "http://json-schema.org/draft-07/schema#",
"title": "Schema",
"type": "object",
"properties": {
"id": {
"type": "string",
"format": "uuid"
},
"username": {
"type": "string",
"minLength": 3,
"maxLength": 30
},
"email": {
"type": "string",
"format": "email"
},
"role": {
"type": "string",
"enum": [
"admin",
"editor",
"viewer"
]
},
"age": {
"type": "integer",
"minimum": 18
},
"tags": {
"type": "string"
},
"settings": {
"type": "object",
"properties": {
"theme": {
"type": "string",
"enum": [
"light",
"dark",
"system"
]
},
"notificationsEnabled": {
"type": "boolean"
}
},
"required": [
"theme",
"notificationsEnabled"
]
}
},
"required": [
"id",
"username",
"email",
"role",
"tags",
"settings"
]
}Zero server network transmission. Your Zod schemas, TypeScript code, and property names are compiled locally inside browser memory.
Output standard JSON Schema Draft 7, Draft 2020-12, OpenAPI 3.0/3.1 specs, or OpenAI / Claude function tool parameters.
Test candidate JSON request or response payloads directly against compiled JSON Schema rules with real-time diagnostic output.
TypeScript and Zod have become the standard for type safety and runtime validation in modern web development. However, external API specs (OpenAPI / Swagger) and Large Language Model agent integrations (OpenAI Tool Calls, Claude Functions, DeepSeek R1) require standardized JSON Schema parameter definitions.
Zero network requests. Proprietary TypeScript interfaces, Zod schema declarations, and internal data structures are compiled 100% inside local browser memory.
Paste Zod schema declarations (`z.object({...})`) or TypeScript interface/type code snippets to generate standard JSON Schema output.
Outputs compliant JSON Schema for OpenAPI 3.0/3.1, JSON Schema Draft 7/2020-12, or OpenAI / Claude function tool parameters.
Visually inspect property types, required field constraints, enums, optional fields, and nested structures with clear node hierarchy.
Test candidate JSON response or request payloads directly against the compiled JSON Schema in real time with line-by-line validation diagnostics.
Load pre-configured production schemas (User Profile, AI Agent Tool Input, SaaS Subscription) and download ready-to-use `.json` schema files.
Our browser-local parser analyzes your TypeScript interface definitions or Zod schema objects (`z.object`, `z.string`, `z.array`, `z.enum`, `z.optional`), resolves nested types and required arrays, and outputs standardized W3C JSON Schema or LLM tool parameter definitions in real time.
No. The HiMat TypeScript / Zod to JSON Schema Generator operates 100% locally in your web browser. Neither your source code, schema parameters, nor generated JSON Schema files ever leave your device.
TypeScript and Zod provide build-time and runtime type safety inside JavaScript applications, while JSON Schema is the universal language for API specifications (OpenAPI, Swagger) and LLM Function Calling (OpenAI, Claude, DeepSeek, LangChain). Converting Zod/TypeScript to JSON Schema bridges client code with external AI agents and microservices.
Our tool supports W3C JSON Schema Draft 7, Draft 2020-12, OpenAPI 3.0/3.1 schema specs, and OpenAI / Claude tool parameters (`parameters` / `input_schema`).
Yes, 100% free with no registration required, no usage limits, and zero advertisements.
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