J. Crew gift cards are indeed redeemable both in-store and online. Customers can use a J. Crew gift card as a form of payment during the checkout process on the J. Crew website. When shopping in a physical store, the gift card can be presented at the register for payment. It is important for customers to check the balance of their gift cards before making a purchase, as J. Crew provides tools on their website to help with this. Additionally, if a customer encounters any issues while trying to use a gift card, it is advisable to refer to the information available on the current J. Crew web page. This ensures that customers have the most accurate and up-to-date details regarding their gift card usage.