404 page checker
What is a 404 Page Checker?
The 404 Page Checker verifies that a website correctly returns an HTTP 404 status code for pages that do not exist, rather than silently serving a 200 OK response for missing content (a "soft 404").
Why Correct 404 Handling Matters
- Crawl budget — Search engines that see soft 404s may keep re-crawling non-existent URLs, wasting crawl budget that could go to real pages.
- Duplicate content risk — A generic "not found" message returned with a 200 status can be indexed as thin/duplicate content across every broken URL.
- User trust — A properly styled 404 page with a real 404 status code signals a well-maintained site to both users and crawlers.
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