A SKETCH file is a vector graphics file created by Sketch, a vector drawing program for Mac OS X. It contains one or more layers of drawn objects that may include text, shapes, symbols, or images. SKETCH files are saved in the Sketch image format that is only supported by Sketch.
SKETCH file open in Bohemian Coding Sketch 41.1
Sketch is mainly used by graphic designers that specialize in Android icons, iOS app icons, iOS UI design, material design, and web design. Designers can create drawings using vector, pencil, shape, text, and slice tools and can also apply fills, borders, shadows, gradients, blurs, or masks to objects on their sketch canvas.
When you are finished with your design you can export a SKETCH file to the .PNG, .JPG, .TIFF, .WEBP, .SVG, .PDF, or .EPS files. You can also upload the SKETCH file to the Sketch cloud directly from the app and share it with other designers.