One of the biggest problems of software development is the management of software quality, both in terms of defects and easiness of maintenance. Software production and evolution is intangible. This nature has caused problems for software developers since there is no sense feedback. The obvious idea is for future development to learn from past experience: avoiding practices leading to poor software quality and emphasizing those increasing it. Static analysis is a way to provide feedback in software development. This paper presents WebMetrics, an extensible tool for static analysis based on software metrics Keywords Static Analysis, Software Metrics