Web page keep changing, so does the structure or even the domain name. An address of webpage that is available now might not be valid in two months from now. The invalid link that redirect to page not found by internet browser is also called dead link. As the owner of a website, it is quite important to make sure all links in your website or blog is valid. Having dead link in your website means that you’re not responsible enough to your readers. Besides credibility, the ability to check dead links is very important in sharing website that always share file using file hosting services such as Rapidshare, Megaupload, or FileServe since those sites keep check hosted files for piracy.

WordPress plugin (only for WordPress website or blog)

• http://wordpress.org/extend/plugins/broken-link-checker/

Features:

• Monitors links in your posts, pages, comments, blogroll and custom fields (optional)
• Detects links that don’t work, missing images and redirects
• Notifies you either via the Dashboard or by email
• Makes broken links display differently in posts (optional)
• Prevents search engines from following broken links (optional)
• You can search and filter links by URL, anchor text and so on
• Links can be edited directly from the plugin’s page, without manually updating each post
• Highly configurable

Drupal plugin

• http://drupal.org/project/linkchecker

Tool to check dead links in any website

• http://www.joomlaspan.com/webtools/webpage-broken-links-checker.php
• http://www.searchengineoptimising.com/find-broken-links-with-link-checker