Birthday Cards Variety Set. If you need a quick and easy way to send birthday greetings to your loved ones, our digital downloadable birthday cards are perfect for you. You can choose from a variety of designs and messages and print them at home or send them online. Our cards are high-resolution and have a PNG format, which means they are compatible with most devices and platforms. Whether you want to express your love, gratitude, humor, or sympathy, our digital downloadable birthday cards will help you convey your feelings in a personal and professional way.