HTTP Status Code Checker
An HTTP status code checker inspects the real-time response returned by a web server when requesting a URL. It reveals the exact 3-digit status code (such as 200 OK, 301 Moved Permanently, 404 Not Found, or 500 Server Error), records response latency in milliseconds, traces intermediate redirect hops, and audits HTTP response headers.
Supports both HTTP and HTTPS URLs. Requests are inspected via a hardened, SSRF-safe probe.
Redirect Progression Trail
Full HTTP Response Headers ▼
What is a HTTP status code checker and when should you use it?
Every time a web browser or search engine crawler requests a page, the server returns a 3-digit HTTP status code along with response headers defined in RFC 9110. Understanding whether your URLs respond with a clean 200 OK or encounter unexpected 301 redirects, 404 errors, or 500 internal server exceptions is fundamental to search engine optimization. Search crawlers allocate a finite crawl budget to your site, and routing spiders through broken or redirecting links degrades indexing velocity. Use this tool to verify individual URLs, or diagnose redirect chains with our Redirect Chain Checker and audit security policies with the HTTP Security Headers Checker. For mass URL validation, switch to our Bulk HTTP Status Checker.
How do you use it?
- Enter a fully qualified HTTP or HTTPS website URL into the input field.
- Click the Inspect URL button to execute a secure server-side response probe.
- Review the returned 3-digit status code, status message, and round-trip response latency.
- Examine intermediate redirect hops and verify whether the final destination resolves properly.
- Inspect the detailed HTTP response headers including Content-Type, Server, and X-Robots-Tag.
Working on a comprehensive technical audit? Browse all free SEO tools to discover the next step in your workflow, or contact our technical support team if you require a specialized custom utility.
Result interpretation & practical applications
When evaluating the output of the HTTP status code checker, review the parsed metrics against your specific site architecture. Outputs are formatted for direct implementation into your HTML source, web server configuration, or Google Search Console audit files.
Always inspect generated values for contextual nuance. Automated tools highlight structural patterns, but manual verification confirms that technical directives align with your overarching SEO strategy.
Technical rules and limitations
- Standard HTTP status codes are grouped into informational (1xx), successful (2xx), redirection (3xx), client error (4xx), and server error (5xx) classes.
- Permanent redirects (301 and 308) pass indexing signals to the target, whereas temporary redirects (302 and 307) maintain signals on the source URL.
- All live requests are processed through our hardened, SSRF-protected backend with strict 4-second timeouts and rate limits.
- Private and reserved IP subnets (such as 127.0.0.1 or 192.168.0.0/16) and non-standard ports are blocked for security.
Common mistakes and troubleshooting
- Relying on browser address bar URLs without verifying intermediate 301 or 302 redirect hops.
- Serving soft 404 pages that display error text to users while returning a 200 OK header to search crawlers.
- Using temporary 302 redirects for permanent URL migrations, preventing search engines from transferring equity.
- Failing to monitor 5xx server errors caused by gateway timeouts or application crashes during heavy crawl bursts.
No tool can promise how a search engine will crawl, index, or rank your pages. This tool generates and validates code against documented technical specifications; you determine where to deploy it, and you should always test changes on staging environments first. Google publishes extensive guidelines in Search Central on evaluating third-party SEO tools and advice. Learn more about our technical testing standards on our about us page, or explore full site audits on our pricing page.
Related free tools & workflows
Browse all Technical SEO Audit Tools →Technical SEO Audit Workflows
Indexability & Crawling
Redirects & HTTP Headers
Authoritative Technical Documentation & Standards
This tool executes logic aligned with official technical documentation and search engine webmaster standards:
- MDN Web Docs HTTP Response Status Codes
MDN Web Docs: HTTP Response Status Codes
Primary engineering source and technical documentation.
- IETF RFC 9110 HTTP Semantics Specification
IETF RFC 9110: HTTP Semantics Status Codes
Primary engineering source and technical documentation.
HTTP Status Code Checker questions
What does HTTP 200 OK mean for technical SEO? ↓
An HTTP 200 status indicates that the web server successfully processed the request and delivered the requested resource. For search engines, a 200 OK response signals that the page is available for crawling, rendering, and potential indexing.
What is the difference between a 301 and a 302 redirect? ↓
A 301 Moved Permanently tells search crawlers that the page has moved permanently to the new address and transfers ranking equity. A 302 Found indicates a temporary relocation, instructing crawlers to retain the original URL in search indexes.
Why does response latency matter for search engine crawlers? ↓
Search crawlers like Googlebot monitor server response latency. If your server takes hundreds of milliseconds or seconds to return headers, crawlers reduce their crawl rate to prevent overloading your hosting infrastructure, delaying new content discovery.
Is this tool free? ↓
Yes. It is completely free to use and requires no registration or subscription.
Does this tool visit my website or store my files? ↓
No. It executes entirely in your local browser runtime. Your inputs and results are never stored or logged on our servers.
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