RootUtils

OpenAPI → TS Client

Client-Side Secure

Generate TypeScript fetch clients from OpenAPI/Swagger. Upload JSON/YAML, inspect endpoints, and download typed SDKs instantly.

OpenAPI / Swagger document
Files never leave your browser.
Spec summary
0 operations
Paste a spec to see endpoints.
TypeScript output
// Generated client will appear here
Quick start
Client-only generation
  • Drop JSON/YAML, review parsed endpoints instantly.
  • Customize the base URL and client class name.
  • Copy/download the generated fetch wrapper without sending files anywhere.

Is this tool broken?

Let us know if you found a bug or have a feature request.

Generate a typed TypeScript HTTP client from your OpenAPI/Swagger specs. Drop JSON or YAML, customize the base URL and class name, then copy or download the fetch wrapper without leaving your browser.

  • Parses JSON/YAML locally with instant endpoint summaries.
  • Outputs lightweight fetch-based client code with typed params.
  • No uploads or servers—everything runs client-side.

You might also like

JSON to TS

Free online JSON to TypeScript Converter. Automatically generate TypeScript interfaces from your JSON objects. Save time and reduce errors.

cURL Converter

Free online cURL Converter. Convert cURL commands to Fetch, Axios, Python, or JSON instantly. Simplify API debugging for developers.

Diff Checker

Free online Diff Checker. Compare text, code, or JSON files side-by-side to find differences. Highlight changes.