Yes, you can upload any JPEG, PNG or GIF file. If the image is greater than 400 pixels wideor 100 pixels in height then eCO2 Greetings software will automatically resize it to fit the ecards. You should try to upload the largest image possible to maximise the quality of your e card i.e. do not upload an image that is 50 x 25 pixels as eCO2 Greetings software will not upsize it and it will look slightly smaller than it deserves to be on your E Card. However, if you prefer for your logo to be smaller on the card then resize to smaller than 400 x 100 pixels. eCO2 Greetings are happy to assist in this process.