# 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

> Canonical page: https://elysiatools.com/en/tools/openapi-to-typescript-generator

- **Category:** Development

- **Keywords:** openapi, swagger, typescript, api types, code generation, schema

## 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.

## Inputs

- **OpenAPI Specification** (textarea): Paste OpenAPI / Swagger JSON or YAML here...
- **Source Format** (select)
- **Output Format** (select)
- **Naming Style** (select)
- **Declaration Style** (select)
- **Namespace Name** (text): Used when output format is namespace
- **Include Operation Types** (checkbox)
- **Include Descriptions** (checkbox)

## 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.

## Frequently asked questions

### 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.

## Related tools

- [OpenAPI to Postman Collection](https://elysiatools.com/en/tools/openapi-to-postman-collection): Turn an OpenAPI 3.x or Swagger 2.0 spec (JSON/YAML) into an importable Postman Collection v2.1.0 with folders, variables, auth and example responses.
- [JSON Schema to Zod Schema Converter](https://elysiatools.com/en/tools/json-schema-to-zod-schema-converter): Convert JSON Schema JSON/YAML definitions into ready-to-use Zod schemas with nested objects, arrays, enums, and common validation rules
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- [API Request Code Snippet Generator](https://elysiatools.com/en/tools/api-request-code-snippet-generator): Generate cURL and common language code snippets from a request URL, method, headers, query parameters, and body
- [Environment Config Diff Visualizer](https://elysiatools.com/en/tools/environment-config-diff-visualizer): Compare dev, staging, and production configuration bundles across JSON, YAML, TOML, or ENV formats and highlight drift, missing keys, and cleanup suggestions

## Samples

- [OpenAPI/Swagger Samples](https://elysiatools.com/en/samples/openapi-swagger): Comprehensive API documentation examples using OpenAPI 3.0 and Swagger specifications for RESTful services
- [OpenAPI/Swagger Samples](https://elysiatools.com/en/samples/openapi): OpenAPI/Swagger specification examples for REST API documentation and contract definition
- [Web Image Processing TypeScript Samples](https://elysiatools.com/en/samples/web-image-processing-typescript): Web TypeScript image processing examples including image read/save, scaling, and format conversion
- [Grafana Advanced Application Samples](https://elysiatools.com/en/samples/grafana-samples): Comprehensive Grafana samples covering advanced dashboard design, alerting configurations, data source integrations, and plugin development

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