A sitemap full of dead URLs: what it does to your Google ranking
A sitemap with hundreds of 404s burns crawl budget and trust. Here's how to spot and fix a broken sitemap.
Your sitemap.xml is Google's shopping list: "These URLs matter to me, take a look at them." When that list is full of dead entries, you keep sending Google into a void — and that has consequences.
What happens when the sitemap lists 404s
- Crawl budget burns: Google fetches URLs that don't exist instead of crawling your real pages. For large shops, that's a genuine problem.
- Trust drops: A sitemap that largely leads nowhere is a quality signal — a bad one.
- In Search Console: The report flips to "Submitted URL not found (404)".
Common causes
A shop migration where the URL structure changed but the sitemap kept the old paths. A trailing-slash difference (/inserat/x/ in the sitemap, but the route is /inserat/x without the slash). Deleted products that were never dropped from the sitemap. Or a sitemap that isn't even valid XML in the first place.
How to check it
- Open the sitemap in your browser (
deine-seite.de/sitemap.xml) — does it even load, and is it valid XML? - Spot-check a few of the URLs from it — do they return 200, or 404/500?
- Check the status under "Sitemaps" in GSC.
That's exactly what Canary does automatically: it loads your sitemap, checks whether it's valid XML, and calls up sample URLs. If they return errors, you get a heads-up — before Google wastes crawl budget en masse.