Do you know how to find broken links?

Often times, web pages are dynamic. Most link scanners are not capable of submitting form information. The trick is to allow a "door" for link scanner go through to scan a dynamic section of a site. A common technique is to hard code hidden link with a query string at the bottom of the page that allows the link scanner to follow into the simulated user input. See the following code for example:

<a href="KB.aspx?KBID=Q1097707"
  >Q1097707 - How do I turn Option Strict on by default in VB.NET?</a
>

Figure: Example source code - finding broken links

It will return all the knowledge base articles in a paged format. The link scanner will click the Next Page link and eventually scan through the entire knowledge base.

Google Webmaster & Bing Webmaster

Google webmaster tools and Bing webmaster centre are useful tools to monitor links.

✅ Figure: In Google webmaster tools you can see all broken URLs, and even the pages who are linking to them (known as referrer, found in the 'Linked From' column)

Figure: In Bing webmaster centre you can find the broken URL which is linked by the above URL

SSW Link Auditor

We have a program called SSW Link Auditor to check for this rule.

✅ Figure: SSW Link Auditor automatically locate broken links

SSW CodeAuditor

Identifying where you have broken links on your website can be a little like finding a needle in a haystack. For enterprise scale web applications with lots of moving parts, it feels more like finding a penny at the bottom of the ocean.

SSW CodeAuditor is a cheap, convenient tool for hunting down broken links, and you don't need a sitemap to set it up. Just point it at a publicly accessible URL and it'll spit out a report.

• Broken links are categorized by page making them easy to fix
• Each broken link listing includes a status code to tell you what went wrong
• Broken Links in the dashboard are displayed with their corresponding anchor text to give you some context about the page
• It can be implemented with you website's Continuous Integration pipeline using GitHub Actions

✅ Figure: Using SSW Code Auditor's broken link dashboard