Following the advance of information technology, nowadays online news portal is very popular. By accessing news portal, people easily read news from their smartphone, smart tab and other mobile devices. In term of human-computer interaction aspect, news portal should serve an effective interaction between the website and readers. News portal should be designed based on standard interface design rules, which is commonly called Eight Golden Rules. The objective of this research is to evaluate the interface of two major Indonesian online news portals, VIVA NEWS and DETIKCOM. Both news portals were evaluated using heuristic method based on eight criteria; consistency, shortcut availability informative feedback, design dialog, error handling, easy reversal action, sense of user control and reduce short-term memory load. The result shows the evaluation of each news portal and the comparison between both news portal. The evaluation result is then useful to improve the usability and functionality of the portals.