YouTube Subtitle English-Japanese Dictionary is a free Chrome add-on developed by myabu. It allows users to look up English words in YouTube subtitles. With this add-on, users can easily search for the meaning of unfamiliar English words. Additionally, users can save words to a vocabulary list for future reference.

By clicking on a word in the YouTube subtitles, users can instantly search for its meaning. The add-on also provides the option to save words to a vocabulary list, allowing users to review and revisit unfamiliar words at a later time. Furthermore, the vocabulary list can be exported as a CSV file for easy organization and sharing.