HTTP Status Code Checker — Lookup Any URL Free
Check HTTP response code and response headers instantly.
🇵🇰 Widely used by Pakistani developers to debug JazzCash and EasyPaisa payment webhook URLs and verify API integrations before go-live.
Bulk HTTP Checker
HTTP Status Reference
FAQ
The Status Codes You'll Actually See
The 15 most common status codes
Every HTTP response starts with a three-digit code that tells you what happened. The first digit is the class: 2xx means success, 3xx means the content lives somewhere else, 4xx means the request was wrong, and 5xx means the server failed. These fifteen cover the vast majority of what a status code checker returns in practice:
| Code | Name | What it means |
|---|---|---|
| 200 | OK | Request succeeded. The expected response for healthy pages and API reads. |
| 201 | Created | A POST created a new resource. Should include a Location header. |
| 204 | No Content | Success with an empty body — common for DELETE and saves. |
| 301 | Moved Permanently | Permanent redirect. Search engines pass ranking signals to the new URL. |
| 302 | Found | Temporary redirect. The original URL stays indexed. |
| 304 | Not Modified | Cached copy is still valid — saves bandwidth, not an error. |
| 401 | Unauthorized | Authentication missing or invalid. Log in / send credentials. |
| 403 | Forbidden | Authenticated but not allowed. Permissions, IP blocks, or hotlink protection. |
| 404 | Not Found | The URL doesn't exist. Fine occasionally; bad at scale for SEO. |
| 410 | Gone | Deliberately removed forever. Stronger de-indexing hint than 404. |
| 429 | Too Many Requests | Rate limited. Slow down and respect the Retry-After header. |
| 500 | Internal Server Error | The server crashed handling the request. Check server logs. |
| 502 | Bad Gateway | A proxy/CDN got an invalid response from the origin server. |
| 503 | Service Unavailable | Overloaded or in maintenance. Should be temporary. |
| 504 | Gateway Timeout | The origin server took too long to answer the proxy/CDN. |
Why status codes matter for SEO
Search engines act on status codes literally. A 301 transfers a page's accumulated ranking signals to its new URL; a 302 doesn't — so a “temporary” redirect left in place for months quietly strands link equity at the old address. Redirect chains (301 → 301 → 200) waste crawl budget and dilute signals at every hop; the checker above shows the full chain so you can collapse it to a single hop. The sneakiest problem is the soft 404: a missing page that returns 200 with a “not found” message. Google flags these as low-quality, and at scale they can drag down a whole site's crawl priority. If content is gone for good, return 410 — it's de-indexed faster than a 404.
Debugging with a status code checker
When a page misbehaves, the response code narrows the search immediately. A 502 or 504 points at the layer between your CDN and the origin server, not your application code. A 403 after a deploy usually means a permissions or WAF rule change. A 429 means you (or your crawler) are being rate-limited — check the Retry-After header before retrying. Pair this checker with the DNS lookup to rule out resolution problems, the SSL checker for certificate errors, and the WHOIS lookup when you need to know who operates a domain.