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Are broken links damaging your website's rankings and usability? There's no getting around it - error 404 pages are bad for business.
Dead Link Checker crawls through your website, identifying broken links for you to correct.
Dead hyperlinks on websites are not just annoying – their existence may cause some real damage to your online business as well as to your reputation in the Internet!
Because of that a web-site may:
All that presents issue so serious that people sometimes say the "link rot problem" (or linkrot) referring to it: as you may already know "rotten" weblink is just another name for the same "dead URL" situation.
With growth of web-site content it's getting harder and harder to manage relations between individual webpages and keep track of hyperlinks within a site. Unfortunately there are no perfect web-site integrity tools or services that can enforce proper relationship between pages, keep track of moving content, webpage renames etc, and update corresponding URLs automatically. With time this causes some hyperlinks become obsolete, stale, odd, dangling, and simply - dead because they don't lead to valid resources anymore, and visitors are going to get 404 error codes (infamous Page Not Found messages) or other unsuccessful HTTP responses each time when they try to access the web-pages. Modern content management systems (CMS like Joomla!) and blog software may aggravate the problem even more - by replicating the same dead weblinks across numerous webpages which they generate dynamically, so people can be getting 404 errors much more frequently. All the just described happens to internal links all the time.
With outbound ones the situation is even worse: the website you are linking to can change names and locations of their pages any time without any notice. The external servers can be brought down (temporarily or forever) or their domains expire or be sold. Alas you don't have any control over such things so the only good remedy would be performing regular sanity tests probing each single outgoing reference to make sure it's still alive and NOT pointing at some non-existing content.
Due to lack of adequate problem detection tools (aka URL validators, web spiders, HTML crawlers, website's health analyzers etc.) it's really very hard to identify what exact local and external (outbound) hyperlinks became dead, and it's even harder to fix those because for cleaning you need to know precise location of the broken linking tag in the HTML code: without that you will need to scan through thousands source lines to find exact HREF (or other subtag) that causes the problem.