Idea of External Link Icon
The icon is of an external link, made up of an arrow pointing out of the upper right corner of an unfinished box. This symbolizes linking to a resource not found within the present document.
This is the External Link icon for Windows 10
. Here we go. Optimized for 32x32 px, these are the simplest icons in the line style. Downloadable formats are PNG and SVG, among others. Icons8 icon pack is unique in providing a huge number of icons designed by the same team of four designers who create the new icons every working day in the same style and with the same quality. Same cool as the Bat Face, huh.