A OS X app and service for turning your Sketch designs into styleguides and resources. Zeplin is designed with both designers and developers in mind. Designers can import their Sketch designs and create their styleguides from colours and fonts used in the designs. Developers can then inspect the same spec to view layout information for every layer in points or export colours to Objective-C or Swift and image assets to PDF or PNG in all the right sizes ready to be dropped into Xcode. Also, every screen in Zeplin has a link so users without the OS X app can view everything online.