JALマイレージキャッチャー is a Chrome add-on developed by kamiyann that helps users accumulate JAL miles while shopping online. This simple-to-use program detects sites where JAL miles can be earned and displays a message to alert users. By installing the add-on and browsing the web as usual, users can ensure they never miss out on accumulating miles, whether it's on Amazon, Rakuten Books, Uniqlo, GU, Bellmezon, or other major online shopping sites. The add-on automatically notifies users, allowing them to discover sites they may have missed for accumulating miles. Highly recommended for frequent flyers.

Version 2.15 is based on the January 2020 JAL Mileage Mall shop information and also includes information on select partner hotels. Users can try the add-on free for 7 days.