JBC - Joomla Backlink Checker
Joomla Backlink Checker (JBC) is the first and only backlink checker for the CMS Joomla! With this extension you can check as many specified link connections as needed.
Manage and check all links to your website(s) and control your web partners without having to visit their website manually. The component can check an unlimited amount of websites fast and reliably using the HTTP class which is provided by the Joomla! API.
The check process in Joomla Backlink Checker is very robust and even detects links that are not set to valid HTML standard. But if the code is too bad, then links may not be detected, even though you can see them in the browser. In this case you should motivate the link partner to improve the source code of his website!
Save your time, you only need one click to check your backlinks!
Trust is good, control is better! ;-)
Joomla! 3.x - https://joomla-extensions.kubik-rubik.de/downloads/jbc-joomla-backlink-checker/joomla-3
The extension is completely free, but you need a subscription for support: