This study examines the association between Internet use and protest politics in South Korea and Taiwan, using secondary data from the sixth wave (2010–14) of the World Values Survey. The data show that Internet use is positively associated with low-cost protest acts, like signing a petition. Internet use is also correlated with the willingness to consider higher-cost actions such as attending demonstrations and joining in boycotts. But it does not appear to consistently increase actual protests of this sort. Discussion is made to address comparable opportunity structures for protest politics in the two East Asian democracies, where the Internet is deeply integrated into the country's political landscape.