Thanks for reaching out to us! There are a couple of things you can do here:
– Try saving in PNG format instead of JPG (this is an option on the Save tab), or if saving in JPG try increasing the quality slider to 8 or 9.
– For retina displays (e.g. Macbooks and newer laptops), you can actually create your images at double the width and height, and then reduce it in the HTML width and height attributes to the true size you need to display it at. This will create a sharper look on those monitors.
Let us know if you have any further questions.
Regards – The Ribbet Team