HTTP Status Codes Reference
Every HTTP status code explained in plain English — with causes, fixes, SEO impact, and monitoring tips. Filter, search, and look up any code instantly.
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Most Common Status Codes
The codes you’ll encounter most often — click any card for full details.
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Status code categories
HTTP status codes are grouped into five classes. The first digit tells you the general type of response at a glance.
Informational
Request received, process continuing. Rarely seen by end users — interim responses.
Success
The request was successfully received, understood, and accepted. Everything worked.
Redirection
Further action is needed. The resource has moved or additional steps are required.
Client Error
The request contains bad syntax or cannot be fulfilled — client-side issue.
Server Error
The server failed to fulfil a valid request. These need immediate attention.
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