Through this tool, you can quickly test the dead links of the website. Dead links - also known as invalid links, that is, those links that are unreachable. The existence of dead links in a website is not a good thing. First of all, if a website has a large number of dead links, it will greatly damage the overall image of the website. Moreover, search engine spiders crawl through links. If too many links cannot be reached, not only the number of included pages will be reduced, but also the weight of your website in the search engine will be greatly reduced. The query can traverse all links of the specified web page, analyze the effectiveness of each link and find out the dead link.