To test Stripe payments, please enter your email address to receive a confirmation email after payment and click on the payment button. You will be transferred to the payment screen.
As card number, please use "4242424242424242", any expiration date as long as it is in the future and any 3-digit CCV (security) number.
The payment demo provided here is a simple payment. Additionally, you could offer paid downloads or add custom calculations from the form right into the final price.