Echoly is a Chrome add-on that provides live dubbing for YouTube videos in various languages. It allows users to hear any video in their preferred language by selecting a voice and target language, with options for both real-time and standard translation modes. The extension requires a Kyma API key for functionality, ensuring no account sign-up is necessary. Users can enjoy translations in 13 languages including English, Spanish, and Japanese, with features such as independent volume control and live source captions.

The application is particularly beneficial for individuals looking to engage with content like keynotes, interviews, and educational videos without waiting for traditional subtitles. With a straightforward user interface, Echoly supports seamless playback and offers a translation history for easy reference. The service prioritizes user privacy by not storing data, making it a convenient tool for language learners and content consumers alike.