JSON Schema to TypeScript Converter

Transform JSON Schema (Draft-04/07/2020-12) specifications into strongly-typed TypeScript interfaces with full support for definitions and enums.

At a glance

JSON Schema to TypeScript Converter is a free, client-side tool that generates clean TypeScript interfaces and types from JSON Schema Draft-04, Draft-07, and Draft 2020-12 specifications online. It handles required fields, optional modifiers, definitions, $defs, and $ref. Processing happens entirely on your device — nothing is uploaded and no account is required.

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100% Client-Side JSON Schema to TypeScript Compiler

Generate strongly-typed TypeScript interfaces and type definitions from JSON Schema Draft-04/07/2020-12 specifications directly in your browser.

100% In-Browser Privacy Instant Compilation
Sample Presets:
Valid Schema 0 chars
Root Type
RootSchema
Types Generated
0
Output Size
0 bytes

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Why Use This JSON Schema to TypeScript Converter?

100% Client-Side Privacy: Proprietary schemas and confidential API contracts never leave your machine.
Full Specification Support: Handles required fields, optional modifiers, definitions, $defs, and $ref.
Union & Enum Types: Accurately converts anyOf, oneOf, and enum arrays into concise TypeScript unions.
JSDoc Comment Generation: Preserves documentation comments from schema description fields automatically.

How to Use JSON Schema to TypeScript Converter

1

Paste JSON Schema

Paste your JSON Schema specification or drop a .json schema file into the source editor.

2

Configure Output Types

Specify your Root Type Name, select between interface or type alias, and toggle JSDoc comments.

3

Copy or Download TypeScript

Copy the generated TypeScript definitions to your clipboard or download as a .ts or .d.ts file.

User Profile JSON Schema to TypeScript Interface

Generates strongly-typed properties, enforces required modifiers, and turns enum arrays into string literal unions.

JSON Schema Input Source 
{
  "type": "object",
  "properties": {
    "id": { "type": "integer" },
    "name": { "type": "string" },
    "role": { "type": "string", "enum": ["admin", "user"] }
  },
  "required": ["id", "name"]
}
TypeScript Interface Output Processed 
export interface UserProfile {
  id: number;
  name: string;
  role?: 'admin' | 'user';
}

Technical Specifications & Engine Details

Technical specifications and engine details for JSON Schema to TypeScript Converter
Specification Details
Supported Formats APPLICATION/SCHEMA+JSON, APPLICATION/JSON, TEXT/PLAIN, .JSON → APPLICATION/TYPESCRIPT, TEXT/PLAIN, .TS, .D.TS
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.
Maintained by Pragyan Pahadi

100% Client-Side Privacy Guarantee

Your files and JSON Schema specifications remain strictly on your local device. Zero data is transmitted to external servers.

Frequently Asked Questions

Which JSON Schema versions are supported?
The compiler supports Draft-04, Draft-07, Draft 2019-09, and Draft 2020-12 specifications, automatically resolving definitions and $defs references.
How are optional properties handled?
Properties listed in the schema's 'required' array are generated as non-null required properties. All other properties are generated with optional '?' markers.
Does this tool send my schemas to any server?
No. All schema parsing and TypeScript compilation execute 100% in your local web browser using client-side JavaScript.

Methodology

Rankings and recommendations here are never paid for.

Last updated .

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