Herdict collects and disseminates real-time, crowdsourced information about Internet filtering, denial of service attacks, and other blockages. Based at the Berkman Center at Harvard University, it is the first and only large-scale project of its kind. When individuals can’t access a site, they can report that experience to Herdict through browser toolbars, e-mail, Twitter, or Herdict.org. Herdict aggregates this data to create a real-time map of global Internet health. This data can be sorted and visualized by country, URL, and date, creating a picture of changes as they are happening. As more of peoples’ lives move online, tools like Herdict will become increasingly important.