SVGMarks is software for transforming distorted images by applying rotation, shear, and perspective transformations based on the location of marks manually placed by a user. To apply the transformations, the correct dimensions (or aspect ratio) between the marks should be known. SVGMarks can also automatically transform a large number of images using a previously transformed single image as a reference. SVGMarks is mainly used to transform images used in electron-beam lithography. However, SVGMarks can also be used to transform general purpose images, as long as the dimensions (or aspect ratio) between the features of the image are known. SVGMarks can stitch multiple images into a single large composite image. The offsets in the composite image are defined by manually placing marks on common features in neighboring images.