This research aims to examine the impact of Internet Financial Reporting (IFR) practices on the market value of Indonesian manufacturing companies' listed on the Indonesia Stock Exchange between 2015 and 2016. This research examines how information available on company websites affects a firm's market value based on efficient market hypotheses, agency theory, and signaling theory. Using 79 firms as the research sample, this research finds empirical evidence that IFR practices have a strong positive relationship to market values over the research period. Overall, the results indicate that investors value IFR information as a source for making equity pricing decisions. The results have implications for both national regulators and entities regarding the importance of information openness.