broken URL, Link Checkers
XENU url link checker:
http://home.snafu.de/tilman/xenulink.html#Description
Check your broken URLs using Xenu: https://seo-hacker.com/check-broken-urls-xenu/
30 Top Website Link Verification Testing Tools
https://www.softwaretestinghelp.com/tools/30-top-website-link-verification-testing-tools/
omparison of Top 5 Dead Link Checker Tools
https://www.softwaretestinghelp.com/broken-link-checker/