Merge two images into one with online tool

ometimes we quickly want to merge two images and if we are using a computer which is not our own or if we are using one at an internet cafe then you might be left stumped because our favorite image editing software wont be on it. In this case how does one merge two images into one. Toolwerk Image Merger works like a charm as it can merge two image files uploaded irrespective of their file formats.