On Page SEO Checker is a Chrome SidePanel extension built for modern web developers and technical SEOs. It enables real-time SEO auditing on Localhost, features a Render Diff engine to compare source HTML against executed DOM (SSR vs. CSR), checks AI crawlers in robots.txt, and exports findings as structured Markdown prompts for AI coding assistants like Cursor and Claude.
SiteLab is a free, in-depth analysis tool that decodes a website's technological DNA. We use our proprietary AI engine, SYNAPSE, to let you discover competitor libraries, determine your code's age (from "Legacy" to "Modern"), and measure technical debt with a holistic A-to-F score. It provides the concrete data necessary to boost your site's performance and Technical SEO, offering an essential roadmap for developers, marketers, and site owners. Start your free analysis today!
CSS, JS, HTML Technology DetectionAnalyzes whether a website's CSS and JS codes are up to dateDec 2025
