What is 4XX Status Codes?


What You Need to Know about 4XX Status Codes

404 Not Found Creates Crawl Errors

The most common 4xx error occurs when pages are deleted or moved without proper redirects, creating dead links that waste crawl budget.

403 Forbidden Blocks Search Engine Access

This error prevents search engines from accessing content, causing pages to be removed from search results and losing organic visibility.

400 Bad Request Indicates Technical Problems

Malformed URLs or server configuration issues trigger this error, signaling technical problems that can impact site credibility with search engines.

401 Unauthorized Requires Authentication

Password-protected or members-only content returns this code, which is appropriate for private content but problematic for public pages.

410 Gone Signals Permanent Removal

Unlike 404 errors, 410 codes tell search engines that content was intentionally removed and won’t return, speeding up index cleanup.

429 Too Many Requests Limits Crawling

Rate limiting can prevent search engine bots from crawling effectively, though this rarely impacts SEO when properly configured for legitimate traffic.


Frequently Asked Questions about 4XX Status Codes

1. How do 4xx errors affect SEO rankings?

4xx errors don’t directly hurt rankings but create poor user experience and waste crawl budget, indirectly impacting search performance over time.

2. Should I redirect all 404 pages?

Only redirect 404s when relevant alternative content exists. Mass redirects to irrelevant pages can harm SEO more than the original errors.

3. How quickly should I fix 4xx errors?

Fix high-traffic 4xx errors immediately with redirects or restored content. Lower-priority errors can be addressed during regular site maintenance cycles.

4. What’s the difference between 404 and 410 status codes?

404 suggests temporary unavailability while 410 indicates permanent removal. Use 410 for intentionally deleted content to speed search engine cleanup.


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