What Is a Soft 404?

March 9, 2026

Definition

A soft 404 is when a page returns a 200 OK or other non-404 status but looks like a missing page to search engines. You’ll see soft 404s in SEO audits and Google Search Console when thin or error pages are served instead of proper 404 or 410 responses. They can waste crawl budget and prevent the right pages from being indexed, and it’s a classification Google applies, not an HTTP status code.

How Search Engines Detect and Classify Soft 404s

Search engines label a response as a soft 404 by weighing page signals against the HTTP status returned.

Classification typically blends content-level cues like boilerplate error copy, empty listings, and template-only pages with retrieval patterns like sudden content drops. It also compares internal and external linking context, redirects, and consistent “not found” semantics across similar URLs to spot systemic absence.

Taken together, these checks separate genuinely available pages from URLs that behave like missing content.

Soft 404 Examples That Limit Organic Growth

Soft 404s matter because they blur the line between real inventory and missing content, which weakens indexing signals and distorts performance reporting. When too many low-value URLs look valid, crawling and ranking attention gets spread across pages that cannot satisfy search intent.

Example 1: A discontinued product URL returns 200 OK with a short “item not found” message and little else, so it competes with real product pages for crawling and indexation.

Example 2: A faceted category page loads with 200 OK but shows zero results and the same generic template across thousands of URL variants, creating large pools of pages that look indexable but provide no unique value.

When Should You Treat Pages as Soft 404s?

Once Soft 404s are understood, the next step is handling them in day-to-day site changes where missing content still returns a valid status. In practice, teams use the label to spot URLs that behave like “not found” pages without sending a 404.

Pages get treated as Soft 404s when a URL resolves but communicates absence, such as discontinued items, expired campaigns, or empty search and filter states. It also fits template-only pages with no unique main content, repeated boilerplate across many URLs, or placeholder copy that never becomes real inventory.

FAQs About Soft 404

Can a redirect still be treated soft 404?

Yes, if it lands on an irrelevant or empty destination. Google may label it soft 404 when intent and content don’t match.

How do soft 404s affect crawl prioritization?

They can dilute discovery signals, causing bots to revisit low-value URL clusters and slow recrawling of updated product, category, and editorial pages.

Should no-results filter pages be indexed?

Usually no; they rarely satisfy search intent. Prevent indexing or generation at scale, and ensure canonicalization and internal links favor meaningful category pages.

Is a custom error page enough for SEO?

Not if it returns 200. Use proper response codes, unique helpful alternatives, and avoid templated thin content that resembles missing pages across many URLs.