SEOlust
Technical

HTTP Status Code Mapper

Map HTTP status codes across redirects and final URLs to identify SEO and technical issues.

All tools

HTTP Status Code Mapper - Visualize Redirects and Response Codes

The HTTP Status Code Mapper is a technical SEO and diagnostics tool that shows how a URL responds across redirects. It maps every HTTP status code encountered from the initial request to the final destination, helping you identify broken links, redirect chains, server errors, and misconfigured responses.

What Is an HTTP Status Code Mapper?

An HTTP Status Code Mapper tracks how a URL responds when requested by a browser or crawler. Instead of showing only the final response, it displays every step along the way, including redirects (301, 302), client errors (404), and server errors (500). This visibility is critical for debugging technical SEO and performance issues.

Understanding HTTP Status Codes

HTTP status codes are numeric responses sent by a server to indicate the result of a request. Codes in the 200 range indicate success, 300 range indicate redirects, 400 range indicate client errors, and 500 range indicate server errors. Search engines rely heavily on these signals to understand site structure and content availability.

Why Mapping Status Codes Matters

A URL may look correct in a browser but still suffer from redirect chains, temporary redirects, or hidden errors. Mapping status codes helps uncover issues that affect crawl efficiency, link equity flow, page speed, and user experience.

What This Tool Checks

  • Initial HTTP response code
  • Each redirect step and its status code
  • Final destination response
  • Redirect depth and loops
  • Error responses such as 404 or 500

Common SEO Problems This Tool Reveals

This tool frequently uncovers redirect chains caused by HTTP to HTTPS migrations, www to non-www redirects, trailing slash inconsistencies, and CMS misconfigurations. It also helps identify broken pages returning 404 errors or servers responding with 500 errors.

Redirect Chains and SEO

While a single 301 redirect is generally acceptable, long redirect chains slow down page loads and waste crawl budget. Each hop increases latency and reduces the amount of link equity passed. Best practice is to redirect directly to the final destination in one step.

Temporary vs Permanent Redirects

301 redirects indicate a permanent move and pass ranking signals, while 302 redirects are temporary. Using the wrong redirect type can confuse search engines and delay indexing updates. This tool helps verify that the correct redirect codes are used.

HTTP Errors and Their Impact

404 errors indicate missing pages, which can be normal in some cases but problematic when internal links or important URLs break. 500-level errors indicate server-side problems and can severely impact crawling and rankings if persistent.

How Developers and SEOs Use This Tool

Developers use the HTTP Status Code Mapper to debug routing rules, load balancers, and server configurations. SEO professionals use it to audit migrations, diagnose indexing issues, and validate fixes before deployment.

Best Practices After Running a Status Code Audit

Once issues are identified, aim to reduce redirect depth, fix broken links, replace 302 redirects with 301 where appropriate, and resolve server errors promptly. Re-run the tool after changes to confirm improvements.

When to Use the HTTP Status Code Mapper

This tool is especially useful during site migrations, HTTPS rollouts, domain changes, CDN setups, and routine technical SEO audits. It provides immediate, actionable insight into how your URLs behave in the real world.

FAQ

Does this tool follow redirects?
Yes, it manually follows redirects and shows each step with its HTTP status code.
Is this useful for SEO audits?
Absolutely. Redirects, 404s, and server errors all affect crawlability and rankings.
Does it use third-party APIs?
No. All checks are performed directly from the server using cURL.
What is a redirect chain?
A redirect chain occurs when a URL redirects multiple times before reaching the final destination.
What status codes are bad for SEO?
Persistent 404, 410, and 500-level errors are harmful if they affect important URLs.
Can it detect redirect loops?
Yes. The tool stops when it detects repeated URLs.
Should I avoid 302 redirects?
Use 302 only for temporary moves. Permanent changes should use 301.
Does it work with HTTPS and HTTP?
Yes, it maps status codes across both protocols.
How many redirects are acceptable?
Best practice is one redirect at most.
Can this help fix crawl budget issues?
Yes. Reducing redirects and errors improves crawl efficiency.

Related tools

Pro tip: pair this tool with XML Sitemap Generator and Schema Markup Generator for a faster SEO workflow.