Privacy Flag (PF) combines crowdsourcing, ICT technology and legal expertise to protect citizen privacy when visiting websites, using smart-phone applications, or living in a smart city leveraging user-friendly solutions provided as a smart phone application, a web-browser add-on and a public website. It develops a highly scalable privacy monitoring and protection solution as well as a global knowledge database of identified privacy risks, together with online services to support companies and other stakeholders in becoming privacy-friendly. Furthermore, it collaborates with standardization bodies and it disseminates towards the public and specialized communities (such as ICT lawyers, policy makers and academics). This project has received funding from the European Union's Horizon 2020 research and innovation programme under grant agreement number 653426.