Can this generate tests from Swagger or OpenAPI files?

Yes. The tool accepts OpenAPI and Swagger JSON and can generate TypeScript helper code, endpoint test cases, smoke tests, negative tests, and setup notes.

Can it use Postman collections?

Yes. Postman Collection JSON can be used as a source for API request structure, test helpers, starter test cases, and environment guidance.

USA Data Tools

OpenAPI Test Generator

Q: Are my API specs uploaded?

No. The generator is designed for browser-local processing. Pasted specs and selected files are processed locally in your browser rather than intentionally uploaded to a USA Data Tools server.

Generate TypeScript API tests from OpenAPI, Swagger, or Postman Collection JSON. Use it as an openapi schema test generator, Swagger test generator, Postman test generator, API test case generator, API smoke test generator, API negative test generator, and browser-local starter kit for integration QA.

Private by design: pasted API specs and selected files are processed locally in your browser. They are not uploaded to a USA Data Tools test-generation server.

Who uses it?

QA engineers, API developers, integration analysts, and support teams can use the generator to turn API definitions into practical test scaffolding before hand-tuning final tests for a project.

What it generates

TypeScript helpers and an API client/test kit
API smoke tests for happy-path endpoint checks
API negative tests for missing fields, bad IDs, invalid methods, and error responses
Starter security tests for authentication and authorization checks
CSV test cases for data-driven testing
Environment/config files and a setup guide

Search phrases

openapi test generator, generate api tests from openapi, swagger test generator, postman test generator, openapi schema test generator, api test case generator, typescript api test generator

Supported inputs

Paste or load OpenAPI JSON, Swagger JSON, or a Postman collection. The workflow is designed for local API specification review and test scaffolding without sending private endpoint details to a remote parser.

Browser-local privacy

The OpenAPI test generator runs in the same browser-local style as the JSON formatter, payload compare, XML formatter, EDI viewer, and CSV delimited converter. Keep sensitive API contracts, sample payloads, and environment hints on your device while you draft test assets.

OpenAPI Test Generator FAQ

Is this only for OpenAPI?

No. The tool is aimed at OpenAPI, Swagger, and Postman Collection JSON so teams can start from the API specification format they already have.

Does it create finished production tests?

It creates a strong starter kit. You should still review generated assertions, environment values, authentication handling, and edge cases before using the tests in a production CI pipeline.

Can I compare generated outputs?

Yes. Use Payload Compare to compare generated files, JSON Formatter to inspect API payloads, and CSV / Delimited Converter to adjust CSV test cases.