Key Takeaways
- HTTP status codes (200, 301, 404, 500) tell search engines whether pages load successfully, have moved, or are broken - directly affecting crawling and indexation.
- Use 301 redirects for permanent URL changes to transfer link equity, and 302 redirects only for temporary moves so Google keeps the original URL indexed.
- Fix 5xx server errors immediately as they block Googlebot from accessing content and can lead to deindexation if persistent.
- Monitor status codes regularly with Rank Crown's site audit and Google Search Console's Coverage report to catch crawl issues early.
What Are Status Codes?
HTTP status codes are three-digit responses that a web server sends to a browser (or crawler) when it requests a URL. They tell Googlebot whether a page loaded successfully (200), moved permanently (301), no longer exists (404), or the server failed (500). Understanding these codes is essential for diagnosing crawl issues and maintaining healthy site indexation. For background context, see the reference at Search Engine Optimization (Wikipedia).
Status codes are grouped into five categories: 1xx (informational), 2xx (success), 3xx (redirects), 4xx (client errors), and 5xx (server errors). For SEO, the most critical codes are 200, 301, 302, 404, 410, 500, and 503. Understanding these is a key part of managing your site's crawl budget effectively. Use Rank Crown's site audit to crawl your site and identify pages returning unexpected status codes.
Pro Tip: Check your Google Search Console Coverage report regularly. Pages returning 4xx or 5xx errors are flagged here, and fixing them quickly prevents crawl budget waste and ranking losses.
2xx Success Codes
A 200 OK status means the page loaded successfully and the content is ready to be indexed. This is the status code you want every important page to return, and it is a prerequisite for pages to appear in your XML sitemap. A 200 response does not guarantee the content is high quality, it simply confirms the server delivered the page without errors.
A 204 No Content means the server successfully processed the request but returned no content. While rare in SEO contexts, watch for "soft 404s", pages that return a 200 status code but display an empty or error-like page. Googlebot treats soft 404s poorly because the status code says "success" but the content says "nothing here." Use Rank Crown's site audit to detect soft 404s.
3xx Redirects
A 301 Moved Permanently tells search engines the page has permanently moved to a new URL. Google transfers most of the original page's ranking signals (link equity) to the destination URL. Use 301s for page consolidation, URL structure changes, and domain migrations. A 302 Found indicates a temporary redirect, Google keeps the original URL indexed and does not transfer link equity.
Avoid redirect chains (A redirects to B, which redirects to C). Each hop slows page load and may lose link equity. Screaming Frog and Rank Crown's site audit detect redirect chains automatically. Fix chains by pointing all redirects directly to the final destination URL. Also watch for redirect loops (A redirects to B, B redirects to A), which prevent the page from loading entirely.
Pro Tip: When deciding between 301 and 302: if the move is permanent and you want the new URL to inherit rankings, use 301. If the move is temporary (A/B test, seasonal page, maintenance), use 302 so Google keeps the original URL indexed.
4xx Client Errors
A 404 Not Found means the page does not exist at the requested URL. A few 404s are normal (deleted products, old blog posts), but excessive 404s waste crawl budget and hurt user experience. Identifying broken internal links is a key part of any technical SEO audit. Always create a custom 404 page with navigation links and a search bar to help users find what they need. Use a 410 Gone for pages you have permanently removed with no replacement, this tells Google to drop the URL from its index faster than a 404.
A 403 Forbidden means the server understood the request but refuses to authorize access. This often occurs when pages are behind a login or restricted by IP. Make sure no important public pages accidentally return 403. A 429 Too Many Requests means rate limiting is active, if Googlebot triggers this, it slows down crawling of your entire site.
5xx Server Errors
A 500 Internal Server Error is a generic catch-all for server-side failures. These are the most damaging status codes for SEO because they prevent Googlebot from accessing your content entirely. If Google encounters repeated 500 errors, it reduces crawl rate and may eventually deindex affected pages. Fix 500 errors immediately by checking server logs for the root cause, common culprits include PHP errors, database connection failures, and misconfigured .htaccess files.
A 503 Service Unavailable tells Google your server is temporarily down (maintenance, overload). Unlike 500 errors, a 503 signals that the issue is temporary, so Google retries later without penalizing rankings. Use 503 with a Retry-After header during planned maintenance to tell Google when to come back.
Pro Tip: During planned maintenance, return a 503 with Retry-After header, never a 200 with a "maintenance page." A 200 maintenance page can get indexed and replace your actual content in Google's index.
Monitoring & Fixing
Set up monitoring for status code errors using Rank Crown's site audit (scheduled weekly crawls), Google Search Console's Coverage report (checks daily), and server-level monitoring tools like UptimeRobot or Pingdom (real-time alerts). Prioritize fixing 5xx errors first (they block indexing), then redirect chains, then high-traffic 404 pages.
For 404 pages that previously had traffic or backlinks, implement 301 redirects to the most relevant existing page. This is the same principle behind broken link building - reclaiming lost link value. Check Google Search Console's "Pages" report for 404 errors and cross-reference with Ahrefs or Rank Crown to identify which broken URLs have external backlinks worth reclaiming through redirects.
Frequently Asked Questions
What is the difference between a 301 and 302 redirect for SEO?
A 301 redirect signals a permanent move and transfers link equity to the new URL, making it the correct choice for URL changes, site migrations, and page consolidation. A 302 redirect signals a temporary move, so Google keeps the original URL indexed and does not transfer ranking signals. Using a 302 when you mean 301 can prevent the new URL from inheriting rankings.
Do 404 errors hurt my site's SEO rankings?
A few 404 errors are normal and do not harm rankings. However, excessive 404s waste crawl budget and create poor user experiences. The real damage occurs when 404 pages previously had backlinks or traffic - those ranking signals are lost. Redirect high-value 404 URLs to relevant pages using 301 redirects to reclaim lost link equity.
What is a soft 404 and why is it problematic?
A soft 404 is a page that returns a 200 OK status code but displays empty, thin, or error-like content. Google detects these and treats them as errors because the status code says "success" but the page has no useful content. Fix soft 404s by either adding meaningful content or returning a proper 404/410 status code for deleted pages.
Should I use 404 or 410 for permanently deleted pages?
Use 410 Gone for pages you have permanently removed with no replacement or redirect target. Google deindexes 410 pages faster than 404 pages because 410 explicitly communicates the content is gone forever, while 404 could be a temporary issue. For pages that have a relevant replacement, use a 301 redirect instead of either status code.
Related Resources
SEO Tool Comparison at a Glance
Choosing the right toolkit depends on your budget and the part of SEO you optimize most often. The table below summarizes how Rank Crown compares to the main alternatives covered across our resources.
| Tool | Starting Price | Free Plan | Best For |
|---|---|---|---|
| Rank Crown | $39/mo | Yes | Focused rank tracking + audits without bloat |
| Ahrefs | $129/mo | Limited | Backlink intelligence and large databases |
| Semrush | $139.95/mo | Limited | All-in-one for agencies combining SEO and PPC |
| Moz Pro | $99/mo | Limited | Beginner-friendly metrics like Domain Authority |
| SE Ranking | $65/mo | No | Budget-friendly tracking with white-label reports |
| Mangools | $29.90/mo | No | Lean keyword research workflow |
Prices verified 2026-05-20 from each vendor's public pricing page. Annual billing typically discounts these figures further.
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