Change Case Inline Tool for the Editor.js.
Change Case Tool for the Editor.js.

Get the package
npm i --save-dev editorjs-change-case
OR
yarn add editorjs-change-case
Include module at your application
import ChangeCase from 'editorjs-change-case';
Add a new Tool to the tools property of the Editor.js initial config.
The locale parameter used to convert according to locale-specific case mappings.
var editor = EditorJS({tools: {changeCase: {class: ChangeCase,config: {showLocaleOption: true, // enable locale case optionslocale: 'tr' // or ['tr', 'TR', 'tr-TR']}}}});