HTTP Status Checker — Check Any URL Response Code
Check the HTTP status code returned by any URL. See if pages return 200, 301, 302, 404, or 500 status codes. Free HTTP response checker. No signup needed.
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What Are HTTP Status Codes?
Every time a browser asks a server for a page, the server replies with a 3-digit status code that summarizes what happened. The first digit defines the category — 1xx informational, 2xx success, 3xx redirect, 4xx client error, 5xx server error. Status codes are the universal language web tools use to describe a request's outcome.
HTTP Status Code Reference Table
The codes you'll see most often during day-to-day debugging, SEO audits, and uptime monitoring. Keep this open as a cheat sheet while you work through a redirect chain or a fresh deploy.
| Code | Name | Meaning | What to Do |
|---|---|---|---|
| 200 | OK | Success | Nothing needed |
| 301 | Moved Permanently | Page moved | Update links |
| 302 | Found | Temporary redirect | Normal |
| 400 | Bad Request | Invalid request | Check URL format |
| 401 | Unauthorized | Login required | Check credentials |
| 403 | Forbidden | Access denied | Check permissions |
| 404 | Not Found | Page missing | Check URL exists |
| 500 | Internal Server Error | Server crashed | Contact owner |
| 502 | Bad Gateway | Upstream error | Try again later |
| 503 | Service Unavailable | Overloaded | Try again later |
Common HTTP Error Codes Explained
404 means the URL is wrong or the page no longer exists. 403 means the server understood the request but is refusing it (permissions). 401 means authentication is required. 500 means the server crashed handling the request. 502/504 mean the server is up but a service it depends on (database, upstream API) failed.
How to Fix Common HTTP Status Code Errors
For 404s, either bring the page back, redirect (301) to the closest equivalent, or remove the broken links pointing to it. For 5xx errors, check the server logs — the cause is in the application or infrastructure, not the URL. For 403/401, review authentication and access rules. For redirect chains, collapse them to a single 301 hop to preserve link equity.
Frequently Asked Questions
What is an HTTP status code?+
An HTTP status code is a 3-digit number returned by a web server to indicate the result of a request. Codes starting with 2 mean success, 3 mean redirects, 4 mean client errors, and 5 mean server errors.
Why does my page return a 404 error?+
A 404 means the page was not found. The URL may be wrong, the page may have been deleted, or the server routing is misconfigured.
What's the difference between a 301 and a 302 redirect?+
A 301 is permanent — search engines transfer ranking signals to the new URL and update their index. A 302 is temporary — the old URL keeps its ranking. Use 301 for permanent moves and 302 only for short-term scenarios like A/B tests.
Is a 304 status code an error?+
No. A 304 (Not Modified) is a successful caching response — the browser already has the latest version of the resource, so the server saves bandwidth by not re-sending it.
Why do I see different status codes for the same URL?+
CDNs, load balancers, and A/B tests can return different responses across regions or sessions. Test from multiple locations and with cache disabled to get a clean reading.
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