HerCity is a platform that involves women in urban development, in order to make better cities for everyone. Turning the tables and putting girls in the expert position, the digital toolbox aims to create more inclusive, equal, and sustainable cities and communities. The initiative makes methods and tools available to urban actors globally, in order to support cities in integrating girls’ participation in their long-term strategies. A toolbox with 9 flexible building blocks, Her City supports urban development from a girl’s perspective. We guide urban actors to implement projects through a step-by-step methodology providing an open and digitally accessible platform for all. We facilitate an ongoing dialogue between professionals and citizens.