When I was creating logo for one of my website, I faced an problem with logo background. No matter what I do, background stayed white and it looked out of sync whenever page had any other colour than white. But his is not a big issue, by using GIMP we can easily change background to transparent and this takes hardly five minutes. Follow along below steps
Step#1 Add an alpha channel
You can add alpha channel two ways
Right click on image Layer → Transparency → Add Alpha Channel
From main menu Layer → Transparency → Add Alpha Channel
Step#2 Bucket fill with colour
Select “Bucket fill” option from “Toolbox” or simple use Shift+B
select Fill transparent areas
select BG colour fill and Sample merged
choose color and fill it. Make sure you select color which is not present in the image because we can going to make these areas as transparent
Step#3 Select by color
From menu choose “select–>by color”
select Fill transparent areas as well as Sample merged.
You don’t have to select apply Antialiasing nor Feather edges.
then click on the color that you want to replace
Step#4 Make it transparent.
This is final and simplest stage. Simple press “delete” key and it will make your image background transparent.
Please let me know if you faced any issues wile doing this.