jsoneditor/examples/react_advanced_demo/src/App.css

A web-based tool to view, edit, format, and validate JSON

.app .contents {
  width: 500px;
  height: 400px;
}

.app .contents .mode {
  padding: 10px 0;
}

.app .contents .code {
  background: #f5f5f5;
  overflow: auto;
}