TypeScript to JSON Schema Converter
Convert TypeScript interfaces, type aliases, and enums into Draft-07 and 2020-12 JSON Schema in your browser.
At a glance
TypeScript to JSON Schema Converter transforms TypeScript interfaces, type aliases, unions, and enums into standard Draft-07 and 2020-12 JSON Schema definitions. It translates scalar types, array brackets, optional properties, and JSDoc annotations into validated JSON Schema properties and required arrays purely in browser memory.
100% Client-Side In-Browser TypeScript to JSON Schema Generator
Compile TypeScript interfaces, type aliases, literal unions, and enums directly into standard Draft-07 and 2020-12 JSON Schema definitions with zero server uploads.
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How TypeScript Types Map to JSON Schema
TypeScript provides static compile-time type safety for JavaScript applications, whereas JSON Schema provides runtime data validation. This converter bridges the gap by transforming compile-time interfaces into declarative validation schemas:
| TypeScript Syntax | JSON Schema Output | Validation Rules & Semantics |
|---|---|---|
| string, number, boolean | { "type": "string" | "number" | "boolean" } | Primitive scalars map directly to corresponding JSON Schema primitive types. |
| prop?: T (optional) | Excluded from "required" array | Properties marked with ? are omitted from the object's required properties list. |
| T[] or Array<T> | { "type": "array", "items": <T> } | Arrays map to JSON Schema array types with recursive item validation schemas. |
| "a" | "b" | "c" | { "type": "string", "enum": ["a", "b", "c"] } | String literal unions map to strict string enums. |
| 1 | 2 | 3 | { "type": "number", "enum": [1, 2, 3] } | Numeric literal unions map to numeric enums. |
| enum Role { Admin = "admin" } | { "type": "string", "enum": ["admin"] } | TypeScript enums extract member values into standard JSON Schema enum arrays. |
| /** Description */ | "description": "Description" | JSDoc comment annotations are preserved in schema and property description fields. |
Why Use This TypeScript to JSON Schema Converter?
How to Use TypeScript to JSON Schema Converter
Paste TypeScript Code
Paste your TypeScript interfaces, types, or enums into the input editor or choose a pre-configured template.
Select Schema Draft
Choose between Draft-07 (broad tooling compatibility) and Draft 2020-12 (latest standard).
Copy or Export JSON Schema
Copy the generated JSON Schema directly to your clipboard or download as a .json file.
TypeScript to JSON Schema example
Transforms TypeScript User interface into a validated JSON Schema object with required id and name properties, and optional bio.
interface User {
id: number;
name: string;
bio?: string;
}
{
"": "http://json-schema.org/draft-07/schema#",
"title": "User",
"type": "object",
"properties": {
"id": { "type": "number" },
"name": { "type": "string" },
"bio": { "type": "string" }
},
"required": ["id", "name"],
"additionalProperties": false
}
Technical Specifications & Engine Details
| Specification | Details |
|---|---|
| Supported Formats | TEXT/PLAIN, .TS, .TSX → TEXT/PLAIN, .JSON |
| Execution Mode | 100% Client-Side In-Browser (client) |
| Browser Requirements | Modern browser with JavaScript enabled. |
| Performance Constraints | Runs client-side in browser memory. Performance and file limits are bounded by available local device RAM. |
100% Client-Side Privacy Guarantee
Your code files remain strictly on your local device. Zero data is transmitted to external servers.
Frequently Asked Questions
How are optional properties handled in the JSON Schema?
Does this tool support string literal unions and enums?
Is my TypeScript code sent to any server?
Methodology
This tool runs entirely in your browser. The example above shows a representative input and the result it produces.
Last updated .