https://pureartisan.github.io/swagger/
It's as simple as passing your swagger file url:
https://pureartisan.github.io/swagger/?url=<file path>
For example, if you want to visualise this file below:
https://raw.githubusercontent.com/OAI/OpenAPI-Specification/master/examples/v3.0/petstore.yaml
Simply pass:
https://pureartisan.github.io/swagger/?url=https://raw.githubusercontent.com/OAI/OpenAPI-Specification/master/examples/v3.0/petstore.yaml
This project is open source and uses many other open source libraries. For more details, please checkout the LICENSE and the package.json files.