HTTP Status Code Lookup
Look up standard HTTP response codes, descriptions, and category classifications instantly.
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Standard response for successful HTTP requests. The actual response payload depends on the request method used.
📖 How to Use This Tool
Follow these quick steps to inspect server response codes:
- Step 1: Select any common HTTP status code from the dropdown selector above.
- Step 2: View official status definitions, error categories, and behavioral explanations.
- Step 3: Use reference details when debugging web servers, APIs, or client requests.
✨ Key Benefits
This utility runs entirely inside your web browser. No server queries or diagnostic logs are transmitted to external systems, ensuring full privacy.
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How HTTP Server Response Codes Work
Browse reference definitions for 1xx, 2xx, 3xx, 4xx, and 5xx HTTP response status codes.
Calculation & Methodology
HTTP Categories: 2xx (Success), 3xx (Redirection), 4xx (Client Error), 5xx (Server Error)
Decode and Verify User-Agent Headers
Parse incoming HTTP request headers and browser signatures.
Parse User AgentFrequently Asked Questions
What is the difference between a 401 and 403 HTTP status code?
A `401 Unauthorized` means authentication is missing or invalid; a `403 Forbidden` means identity is known but access is prohibited.
Which HTTP status code is used for permanent SEO redirects?
A `301 Moved Permanently` status code passes search ranking signals and link equity to the new target URL.