SEOquake

SEOquake puts an on-page SEO checker inside Chrome, so a page can be reviewed while you browse or search. A Quick View gives a compact snapshot of the page you are on, and a Full Report goes deeper when needed. It reviews the title tag, meta description, heading structure, canonical tag, indexability and word count, and runs a page-level audit for content, mobile and technical issues. Link analysis covers broken links, anchor text, follow status and HTTP status codes, and a keyword density report shows which words a page leans on. A toolbar keeps traffic estimates and backlink counts visible on the page, drawing on Semrush metrics. The search results overlay also covers AI Overviews, showing which pages they cite. It is a free extension, made by Semrush, that has been in use since 2006 for auditing your own pages and studying competitors.