Website Tools
HTTP Status Checker
Check the HTTP status code any website returns.
Enter a domain to check its HTTP status code.
JustChecker monitors your websites around the clock and alerts you the instant something goes down.
Frequently Asked Questions
A 301 signals a permanent redirect (search engines transfer ranking signals to the new URL); a 302 signals a temporary one (the original URL is expected to be used again, and ranking signals generally stay with it) - using the wrong one is a common, impactful SEO mistake.
A page can display content while still returning a non-200 status invisible to a casual look (for example, a custom error page incorrectly served with a 200 status, or vice versa) - search engines and automated tools rely on the actual header, not visual appearance.
4xx codes indicate a client-side issue (like 404 Not Found - the specific resource doesn't exist); 5xx codes indicate the server itself encountered an error while trying to fulfill a valid request - a much more serious signal about server health.
Generally yes, but a "soft 404" - a page that returns 200 while displaying "page not found" content - can confuse both users and search engine crawlers, which is worth checking for on any page meant to signal it doesn't exist.
403 means the server understood the request but is refusing to fulfill it - often due to permissions, IP blocking, or a security rule - as opposed to 404, which specifically means the resource wasn't found at all.
Indirectly, yes - persistent 5xx errors can affect crawl budget and indexing, and improperly configured redirect chains or status codes can prevent ranking signals from consolidating onto your intended canonical URL.