Generate Swagger UI / OpenAPI specs from a simple description. Enter title, version, and endpoints to produce a complete spec JSON. Everything runs locally in your browser — nothing is uploaded.
Generate Markdown API documentation from OpenAPI specs. Create clean, readable docs with endpoints, parameters, and response examples.
Generate mock API responses from OpenAPI spec fragments. Create realistic sample data for API development and testing.
Convert OpenAPI specs to Postman collection JSON format. Import directly into Postman. Everything runs locally in your browser — nothing is uploaded.
Convert messy CSV or Excel sheets from clients into clean JSON in one batch. Handles missing values, nested rows, and generates strict JSON schemas for 50+ files at once. Everything runs locally in your browser — nothing is uploaded.
Bidirectional YAML to JSON and JSON to YAML conversion with auto-format detection and real-time preview. Perfect for configuration files, API payloads, and data migration.
Swagger/OpenAPI Generator lets you generate Swagger UI / OpenAPI specs from a simple description. Enter title, version, and endpoints to produce a complete spec JSON. Everything runs locally in your browser — nothing is uploaded.. It works on any device with a modern web browser.
Generate Swagger UI / OpenAPI specs from a simple description. Enter title, version, and endpoints to produce a complete spec JSON. Everything runs locally in your browser — nothing is uploaded. It runs entirely in your browser — no software installation or data uploads required.
Configure your settings below — the output generates instantly.
Yes. After the initial page load, Swagger/OpenAPI Generator runs entirely on your device with no internet connection needed. All processing is done locally.
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.
Yes. For each endpoint, define the HTTP method, path, request body schema, response schemas, and status codes.
The output is an OpenAPI spec JSON that can be loaded into Swagger UI, Redoc, or any OpenAPI-compatible documentation tool.
Enter your endpoints manually. For existing APIs, describe each route and its parameters. The tool structures it into valid OpenAPI format.
No. All generation happens locally in your browser. No API data is transmitted.
OpenAPI Validator
Validate OpenAPI/Swagger spec syntax. Check for required fields, missing paths, and structural issues in your API specification.
OpenAPI Documentation Generator
Generate Markdown API documentation from OpenAPI specs. Create clean, readable docs with endpoints, parameters, and response examples.