SEO Scrubbox

Technical SEO & AI crawl checks: canonicals, rendering diffs, redirects, sitemaps, hreflang, JSON-LD, CrUX.

SEO Scrubbox is a lightweight yet advanced Chrome extension built for SEO professionals, developers, and technical marketers who need accurate, real-world insight into how a page behaves for search engines and AI crawlers. It combines instant on-page analysis with deeper HTTP-based audits, showing both view-source and fully rendered states so you can understand exactly what Googlebot, Bing, and AI systems actually see. Designed for modern SEO and AI search optimisation workflows, SEO Scrubbox helps diagnose canonical inconsistencies, rendering differences, structured data quality, crawl signals, redirect behaviour, and sitemap visibility without leaving the page you are auditing. Core capabilities Fast checks with rendered awareness • Detects current URL and captures full redirect chains from real browser navigation • Displays real HTTP status codes with colour-coded interpretation • Automatically updates the extension icon based on live indexability signals • Compares canonical tags before and after JavaScript rendering • Flags canonical changes introduced by JS • Detects meta robots and Googlebot directives • Highlights noindex, nofollow, none, and X-Robots-Tag signals • Identifies title and meta description changes caused by JS • Normalises text comparison to ignore harmless entity differences • Shows self-referencing canonical status based on rendered URL • Allows per-site JavaScript toggle for controlled testing Deep technical audit • Recursively discovers and evaluates sitemaps declared in robots.txt • Detects sitemap index vs URL set structure • Shows lastmod values when available • Skips oversized sitemap environments automatically to preserve audit speed • Applies intelligent limits for large or complex sitemap architectures • Validates hreflang status codes • Checks hreflang return link reciprocity • Audits internal links with status codes, redirect detection, and rel="nofollow" flags • Identifies internal links that resolve via redirects • Adjustable internal crawl limit via interactive slider • Progress tracking system for long-running audits Rendered vs non-rendered comparison • Compares internal link count before and after rendering • Compares word count before and after rendering • Visual half-wheel comparison UI for fast interpretation • Helps identify JavaScript SEO issues, hidden content, and DOM rewriting Structured data inspection • Detects all JSON-LD scripts on the page • Validates JSON format per script • Displays validation status directly in each schema accordion • Expands and renders each schema in a structured, readable format • Supports complex schema types including Organization, Product, FAQPage, ItemList, BreadcrumbList, CollectionPage and more • Extracts nested entities from @graph structures • Formats offers, reviews, ratings, contact points, breadcrumbs, and item lists clearly • Decodes encoded HTML safely inside structured data • Surfaces entity clarity issues relevant to AI search ingestion Redirect intelligence • Captures real navigation redirect chains via browser events • Differentiates between HTTP redirects and client-side canonical rewriting • Detects redirecting internal links during deep audits • Displays final status codes for redirected resources Indexability clarity • Robots.txt parsing with Google-style precedence logic • Canonical mismatch detection before and after render • Meta robots comparison between view-source and rendered DOM • X-Robots-Tag header evaluation • Automatic icon colour change when page becomes non-indexable • Consistent indexability evaluation between quick check and deep audit AI search optimisation ready SEO Scrubbox is built with modern AI-driven search in mind. It helps optimise for: • Google Search generative experiences • Bing AI • AI overviews and answer engines • LLM-based crawlers and AI agents • Entity clarity and structured data consistency • Canonical stability for AI indexing • Clean crawl signals for machine-readable interpretation • Rendering consistency between static HTML and DOM state By comparing view-source HTML and rendered DOM signals, it ensures your pages are consistent and interpretable by both traditional search engines and AI systems. Core Web Vitals (CrUX integration) • Optional Google Chrome UX Report integration • Uses your own API key • Displays real user LCP, INP, and CLS field data • Classifies metrics into Good, Needs improvement, or Poor User-agent control • Emulate Googlebot smartphone • Emulate Googlebot desktop • Use custom user agents • Modify request headers for controlled testing Why use SEO Scrubbox • Runs locally in your browser, no external servers • No page reload required for most checks • Automatic icon colour changes based on indexability • Built-in audit caching for faster repeat analysis • Real-time redirect tracking • JavaScript toggle for render testing • Designed for real technical SEO debugging • Ideal for diagnosing canonical drift, JS rewriting, sitemap issues, redirect chains, hreflang inconsistencies, and crawl inefficiencies • Fast enough for daily audits, precise enough for advanced investigations SEO Scrubbox focuses on signal clarity over noise, helping you understand exactly what search engines and AI crawlers see, how your page is interpreted, and why it behaves the way it does.