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.

OpenAPI to TypeScript Generator | Online Free Tool

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'.

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.

OpenAPI to TypeScript Generator | Online Free Tool | Elysia Tools

OpenAPI to TypeScript Generator

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Examples

1. Generating API Types for a User Service

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