Swagger/OpenAPI Generator
Generate Swagger UI / OpenAPI specs from a simple description. Enter title, version, and endpoints to produce a complete spec JSON. Code never leaves your device — formatting and validation run locally in your browser.
How to Use the Swagger/OpenAPI Generator
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Frequently Asked Questions
What does this tool generate?
A complete OpenAPI 3.0 spec JSON file with info, servers, paths, and schemas. Enter your API title, version, and endpoints to produce a ready-to-use specification.
Can I define request/response schemas?
Yes. For each endpoint, define the HTTP method, path, request body schema, response schemas, and status codes.
Does it generate Swagger UI?
The output is an OpenAPI spec JSON that can be loaded into Swagger UI, Redoc, or any OpenAPI-compatible documentation tool.
Can I import an existing API?
Enter your endpoints manually. For existing APIs, describe each route and its parameters. The tool structures it into valid OpenAPI format.
Is my API data stored?
No. All generation happens locally in your browser. No API data is transmitted.
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Last updated October 2026