Yes, many international gift cards can be used for online purchases. However, it is important to check the terms and conditions of each specific gift card to ensure that it can be used for online transactions. Some gift cards may only be accepted at physical store locations or have restrictions on their usage. Additionally, it is important to consider any potential currency exchange fees or international transaction fees that may apply when using an international gift card online. It is recommended to thoroughly review the details of each gift card before making any purchases to avoid any unexpected fees or restrictions.