YAMLess - Swagger UI, but you also edit the spec

Swagger UI is great for exploring APIs, but the spec is read-only. To change paths, schemas, or parameters you jump to another editor and keep two views in sync.

YAMLess is a fork of Swagger UI. It keeps the same layout and try-it-out flow, but adds inline edits that update the OpenAPI document in place.

• Live demo: devfros.github.io/yamless-editor
• Source: github.com/devfros/yamless-editor

Save with GitHub

Sign in with GitHub to store your spec in a Gist and load it back later.

Walkthrough

Starting from a clean demo:

Petstore demo with the usual Swagger UI layout.

Add a schema from the UI:

Add a tag:

Add an endpoint:

Edit an existing endpoint:

Add a parameter:

Edit the request body:

Add a response body:

Wire in a new schema:

Edit schema fields:

Why I built it

I wanted something lightweight for quick API design sessions. If that sounds useful, try the demo and open an issue or PR on the repo.