1. What Is a Soft 404 Error?
A Soft 404 error occurs when a web server returns an HTTP 200 OK success status code for a page that actually contains missing content, an empty search result, or an error message like "Sorry, this page does not exist."
To search engine crawlers, this creates severe confusion. The server header declares the page is healthy, but machine-learning algorithms detect that the page is functionally empty or missing. Google flags these as Soft 404s and removes them from search results.
2. Common Causes of Soft 404s
- Custom 404 pages returning HTTP 200: Your website displays a "Not Found" message, but your web server fails to send a true
404 Not Foundor410 Goneheader. - Redirecting missing pages to the homepage: Mass-redirecting hundreds of deleted URLs to the homepage causes Google to flag them as Soft 404s because the homepage content does not match the original topic.
- Empty Category or Tag Archive Pages: Category pages with zero published articles or empty e-commerce filters that render no products.
- Thin, Near-Blank Landing Pages: Pages with less than 50 words of content that search engines deem equivalent to a blank document.
3. How to Fix Soft 404 Errors
- Send True 404/410 Status Codes: Ensure missing URLs return an explicit
http_response_code(404);in PHP. - Redirect to Relevant Equivalents: Use 301 redirects exclusively to point missing pages to equivalent content, never to an unrelated homepage.
- Populate or Noindex Empty Archives: Add content to thin category pages, or apply
<meta name="robots" content="noindex, follow">until content is created.
SEOFree Technical Review
This guide was researched, tested, and authored by the SEOFree Editorial Team in accordance with Google Search Essentials and technical SEO best practices.