Free Seo Duplicate Content Tool - Version 1 This Amazing little duplicated content checker offers the easiest and fastest way scan for duplicated content between two articles. This will help you to easily identify the percentage of duplicated content found and reveal to you exactly which are the areas which are duplicated! Furthermore, you get to scan for the keyword density of each and every single article, helping you greatly in your SEO efforts. Vry Handy little tool.