HTTP Status Code Explainer
Search any HTTP status code for its plain-English meaning, category, and SEO impact — a fast reference for developers and SEOs.
Every status code, explained
HTTP status codes are the language servers use to tell browsers and crawlers what happened with a request — and knowing them cold saves hours of debugging and prevents costly SEO mistakes. This explainer lets you search by code or keyword and returns the meaning, the category it belongs to, and, where relevant, how it affects search engines.
The SEO notes matter: mixing up a 301 and a 302 can strand your rankings on an old URL, serving a soft 404 (a "not found" page that returns 200) confuses crawlers, and using 410 for deliberately removed content speeds up de-indexing. Type a code to see the details instantly.
Private and instant
The reference runs entirely in your browser — nothing is uploaded.
Frequently Asked Questions
What are the HTTP status code categories?
1xx informational, 2xx success, 3xx redirection, 4xx client errors, and 5xx server errors. The first digit tells you the general class of response at a glance.
What is the difference between 301 and 302?
A 301 is a permanent redirect that passes ranking signals to the new URL; a 302 is temporary and tells search engines to keep the original URL indexed. Use 301 for permanent moves.
What does a 410 mean versus 404?
404 means "not found" (it might return later); 410 means "gone" permanently. Using 410 for content you have intentionally removed helps search engines drop it faster.
Is this tool free and private?
Yes. The lookup runs in your browser — nothing is uploaded or stored.
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