Log Validator is a web server log analysis tool with focus on the quality of Web documents. Thanks to a modular, extensible design, the Log Validator can help Web authors find the most popular content on their web site that matches a particular criteria. The Log Validator was first written with Validation (HTML, etc.) in mind : it can thus help web content managers find and fix the most frequently accessed invalid documents on their Web site, acting as a comprehensive, step-by-step validation tool.