WD-404 Website Diagnostics
WD-404 is a website diagnostics tool that crawls a site and reports on broken pages, redirect chains, crawl issues, and other common problems that slow websites down and hurt search visibility. It gives you a clear picture of what is going wrong before visitors or search engines have to find it themselves.
Most websites pick up broken links and redirect problems over time as pages move, get renamed, or get deleted. WD-404 was built to make it easy to spot those problems without having to click through the site manually or rely on expensive third-party auditing tools.
Built by Ben Treder. Source code and installation instructions on GitHub.
Diagnostics
What WD-404 checks
WD-404 crawls through a website and collects information about page status, redirects, and accessibility issues that are easy to miss when reviewing a site manually.
404 and broken pages
Finds pages that return a 404 error or other broken status codes so you know exactly which URLs need to be fixed or redirected.
Redirect chain detection
Identifies URLs that pass through multiple redirects before reaching the final destination, which can slow down page load and dilute link value.
Crawl coverage
Crawls the site systematically and reports on what was found, what could not be reached, and what returned unexpected responses.
Why I built this
Broken pages and messy redirects show up on almost every website I work on. Most of the time the site owner has no idea because they are focused on running their business, not checking every URL. WD-404 started as something I ran internally to get a fast picture of a site before digging into fixes.
Also: Website Fix Finder for quick checks
If you want a faster, no-install option for spotting common website issues, the Website Fix Finder tool runs a quick scan and generates a report in your browser. No setup needed.
Need a full website audit or cleanup?
If your site has broken pages, slow redirects, or crawl issues you want someone else to investigate and fix, reach out. I do hands-on website reviews and cleanup for small businesses.