dead link checker - SERP Analysis

https://www.deadlinkchecker.com/

https://www.drlinkcheck.com/

https://www.brokenlinkcheck.com/

https://ahrefs.com/broken-link-checker

https://www.reddit.com/r/webdev/comments/15o2xye/is_there_a_tool_for_checking_broken_links/

https://error404.atomseo.com/