If you do have the swagger json file which you feed to the swagger UI, then to generate .yaml file just click on the below link copy-paste your json in the editor and download the yaml file. This is a straight forward method; link : https://editor.swagger.io/#

Mar 18, 2019 · APIMatic API Transformer can process a Postman collection (v1 or v2) as an input format and produce Swagger 1.2 or 2.0, and now OpenAPI 3.0.0 as output. It has its own API and a Web front-end, and also a command-line version.

Oct 16, 2022 · In this previous post, I showed you how you can create your own API documentation, compliant with the OpenAPI 3.0 specifications, using Firefox and mitmproxy2swagger. The point is to have a documentation file that you can then import into Postman as a collection and then start testing the target API …

Oct 26, 2023 · Automatically convert a collection into an OpenAPI definition and programmatically sync the API definition in Postman. In this post, we’ll show you how you can use the new Postman API endpoint to easily turn your collections into OpenAPI definitions you …

Swagger UI – Renders OpenAPI specs as interactive API documentation in browser. Swagger Codegen – generates server stubs and client libraries from an OpenAPI specification. The specification OpenAPI is an API description format for REST APIs.

Fetch the ID of the Collection you wish to convert. This can be found by selecting the Collection in Postman, navigating to the right-hand sidebar, clicking the Info tab (symbolized by the i icon), and copying the ID.

Apr 12, 2025 · Upload your Postman collection JSON file or paste the collection URL. Click "Convert" and download the resulting OpenAPI specification. This method is great for one-off conversions or when you don't want to set up a development environment.

Dec 20, 2023 · Step 1: Click on three dot button of your collection. Step 2: Scroll down and Select Export Option. Step 3: Choose "Collecion v2.1" and Click on "Export" button. Step 4: Choose the File location where you want to save this file. then Click "Save" to export the collection.

Jul 12, 2019 · You can export the collection as a json as shown in the other answer and then run a tool to convert it into an HTML document that you can host wherever you want. I created a simple python executable to do just that - https://github.com/karthiks3000/postman-doc-gen

Apr 22, 2025 · Exporting the Collection. Open Postman and select the collection you wish to export. Click on the three dots next to the collection name to open the options menu. Choose 'Export' and select the format as 'Collection v2.1' or 'Collection v2'. Save the exported JSON file to your local machine. Converting to OpenAPI