Song Maker Toolkit is a Chrome extension designed to enhance the user experience on Chrome Music Lab. This toolkit offers a range of quality-of-life features, including access to 8 octaves for creating intricate melodies. The addition of a "Play Song At" button allows users to easily listen to their compositions, while the ability to repeat notes aids in fine-tuning musical arrangements.

Furthermore, Song Maker Toolkit enables users to save their compositions in JSON format, providing a convenient way to store and share musical creations. With more features on the horizon, this Chrome extension is a promising tool for music enthusiasts and creators looking to elevate their experience on Chrome Music Lab.