Backlink Checker

About Backlink Checker

Backlink Checker is a free tool from Ahrefs that shows backlink and authority data for any website, URL, or subsection. It reports metrics including the number of referring domains, number of backlinks, Domain Rating (DR), and Ahrefs Rank (AR), and displays an interactive view of how a site's referring domains and backlink profile have grown or declined over time.

The tool draws on Ahrefs' own web crawler and backlink index, which the page states covers 493 billion pages, 210 million domains, 28 trillion internal backlinks, and 35 trillion external backlinks (historical records), updated every 15 minutes. A companion browser extension, the Ahrefs SEO Toolbar, is available for Chrome and Firefox and lets users check DR and UR metrics for any site while browsing, requiring a free Ahrefs account.

The tool is intended for SEO practitioners, marketers, and website owners who want to research a site's backlink profile and authority, including for competitor analysis. This free version is described as a limited preview of Ahrefs' full paid backlink analysis product.

Key features

• Free backlink checker for any domain or URL
• Shows referring domains, backlink counts, Domain Rating (DR), and Ahrefs Rank (AR)
• Backlink index updated every 15 minutes
• Interactive chart of referring domain growth or decline over time
• Browser extension (Chrome/Firefox) to check DR/UR metrics while browsing

Frequently asked questions