You are only charged when you decide to keep a card.
Making and previewing a card is free. We show you a watermarked preview first. When you are happy, you pay to remove the watermark and download or send the finished card.
That means you never pay just for trying. If the first preview is not quite right, you can tweak your description and regenerate a couple more times (three previews in total) to land on one you love before you commit. Payments are taken securely at checkout.