OpenAPI to TypeScript Generator

Convert OpenAPI or Swagger JSON/YAML specs into TypeScript API types, request payloads, and response models with configurable output and naming styles

Example Results

1 examples

Generate flat API types from an OpenAPI schema

Convert a small OpenAPI document into flat exported TypeScript interfaces for component schemas and endpoint contracts

export interface User {
  id: string;
  name: string;
}

export interface GetUserPath {
  id: string;
}

export type GetUserResponse = { status: "200"; data: User };

View input parameters

{ "specInput": "openapi: 3.0.0\ninfo:\n title: User API\n version: 1.0.0\npaths:\n /users/{id}:\n get:\n operationId: getUser\n parameters:\n - in: path\n name: id\n required: true\n schema:\n type: string\n responses:\n \"200\":\n description: ok\n content:\n application/json:\n schema:\n $ref: \"#/components/schemas/User\"\ncomponents:\n schemas:\n User:\n type: object\n required: [id, name]\n properties:\n id:\n type: string\n name:\n type: string", "sourceFormat": "yaml", "outputFormat": "flat", "namingStyle": "pascal", "declarationStyle": "interface", "namespaceName": "Api", "includeOperationTypes": true, "includeDescriptions": true }

OpenAPI Specification *

Source Format

Output Format

Naming Style

Declaration Style

Namespace Name

Include Operation Types

Include Descriptions

Key Facts

Category: Development
Input Types: textarea, select, text, checkbox
Output Type: text
Sample Coverage: 4
API Ready: Yes

Overview

The OpenAPI to TypeScript Generator allows developers to instantly convert Swagger or OpenAPI JSON/YAML specifications into strongly-typed TypeScript interfaces, request payloads, and response models, ensuring type safety across your API integration layer.

When to Use

•When you need to synchronize frontend API models with backend schema changes.
•When you want to eliminate manual type definitions for API endpoints.
•When you need to maintain consistent naming conventions across large-scale API documentation.

How It Works

•Paste your OpenAPI or Swagger JSON/YAML specification into the input area.
•Select your preferred output format, naming style, and declaration type.
•Toggle options to include operation types or documentation descriptions.
•Generate and copy the resulting TypeScript code for use in your project.

Use Cases

Automating frontend API client type generation from backend Swagger docs.

Standardizing API response models across multiple microservices.

Rapidly prototyping TypeScript interfaces from existing API specifications.

Examples

1. Generating API Types for a User Service

Frontend Developer

Background: The backend team updated the User API schema, and the frontend developer needs to update the TypeScript interfaces to match the new response structure.
Problem: Manually updating complex nested interfaces is error-prone and time-consuming.
How to Use: Paste the YAML schema, select 'Interface' as the declaration style, and enable 'Include Operation Types'.
Example Config: sourceFormat: yaml, outputFormat: flat, namingStyle: pascal, declarationStyle: interface
Outcome: The tool generates clean, exported TypeScript interfaces for the User model and corresponding path parameters, ready to be imported into the API service layer.

Try with Samples

json, yaml

OpenAPI/Swagger Samples

Comprehensive API documentation examples using OpenAPI 3.0 and Swagger specifications for RESTful services

title token openapi

json, yaml

Web Data Serialization TypeScript Samples

Web TypeScript data serialization examples including JSON serialization/deserialization and XML parsing

title token typescript

json

OpenAPI/Swagger Samples

OpenAPI/Swagger specification examples for REST API documentation and contract definition

title token openapi

yaml

Web File Operations TypeScript Samples

Web TypeScript file operations examples including text file read/write, file copy/move, directory traversal, and file validation

title token typescript

sample

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FAQ

Which OpenAPI versions are supported?

The tool supports standard OpenAPI 3.0 and Swagger 2.0 specifications provided in JSON or YAML format.

Can I choose between interfaces and type aliases?

Yes, you can toggle the declaration style between 'Interface' and 'Type Alias' in the configuration settings.

Does it support namespace wrapping?

Yes, you can select 'Namespace Wrapper' in the output format settings and define a custom namespace name.

Will my documentation comments be preserved?

Yes, if you enable the 'Include Descriptions' checkbox, the tool will map schema descriptions to TypeScript comments.

Is the generated code ready for production?

Yes, the output is standard TypeScript code that can be directly integrated into your frontend or backend services.

API Documentation

Request Endpoint

POST /en/api/tools/openapi-to-typescript-generator

Request Parameters

Parameter Name	Type	Required	Description
specInput	textarea	Yes	-
sourceFormat	select	No	-
outputFormat	select	No	-
namingStyle	select	No	-
declarationStyle	select	No	-
namespaceName	text	No	-
includeOperationTypes	checkbox	No	-
includeDescriptions	checkbox	No	-

Response Format

{
  "result": "Processed text content",
  "error": "Error message (optional)",
  "message": "Notification message (optional)",
  "metadata": {
    "key": "value"
  }
}

Text: Text

AI MCP Documentation

Add this tool to your MCP server configuration:

{
  "mcpServers": {
    "elysiatools-openapi-to-typescript-generator": {
      "name": "openapi-to-typescript-generator",
      "description": "Convert OpenAPI or Swagger JSON/YAML specs into TypeScript API types, request payloads, and response models with configurable output and naming styles",
      "baseUrl": "https://elysiatools.com/mcp/sse?toolId=openapi-to-typescript-generator",
      "command": "",
      "args": [],
      "env": {},
      "isActive": true,
      "type": "sse"
    }
  }
}

You can chain multiple tools, e.g.: `https://elysiatools.com/mcp/sse?toolId=png-to-webp,jpg-to-webp,gif-to-webp`, max 20 tools.

If you encounter any issues, please contact us at [email protected]

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