Check Page SEO is a powerful browser-based audit tool that analyzes on-page, technical and content factors in real time. Perform 40+ point SEO audits, compare pages against competitors, and uncover keyword gaps—all without leaving your browser. Analyze meta tags, heading structure, links, images, schema markup, indexability and more. Built-in competitor comparison identifies missing keywords and content optimization opportunities. Includes readability analysis, keyword density tracking, Core Web Vitals checks and Open Graph validation. Perfect for SEOs, marketers, agencies and website owners who need fast, actionable insights to improve rankings. Turn audit findings into concrete improvements with one intuitive tool.