SEOquake

SEOquake is the world's most widely used SEO browser extension: it shows the main metrics of any page directly in the SERP and on the browser bar, without opening additional tools. It's one of the free must-haves for any SEO professional.

SEOquake is a free extension for Chrome and Firefox developed by Semrush that shows SEO information directly while you browse. With the extension installed, every Google search result automatically shows the main page metrics below it: number of backlinks, Domain Authority (or equivalent parameters), indexing date, number of indexed pages, Alexa Rank and other data. On individual web pages, the SEOquake bar shows the same metrics for the page you're visiting, with a click to open a detail panel with information on meta tags, headers, internal and external links, keyword density. The SEO Audit feature quickly analyzes the current page against a set of on-page optimization parameters. The data comparison lets you visually analyze competitors in the SERP without opening additional tools. SEOquake is free and doesn't require a Semrush account for basic features.

For SEO specialists, content marketers and anyone who wants the main SEO metrics of any page always at hand while browsing, without opening additional tools.

SEOquake is completely free. The extension installs on Chrome or Firefox at no cost and without needing a Semrush account. Some advanced features may require a free or paid Semrush account, but basic use of the extension to view SEO metrics in the SERP and on pages is always free.