Web & Network
Reference for all standard HTTP status codes. Search, filter by category, and click to copy.
All, 1xx, 2xx, 3xx, 4xx, or 5xx — to narrow the grid to one status class.404 Not Found) to your clipboard.timeout and select 5xx Server Error to see only timeouts on the server side.Look up a status you got from an HTTP client or API to understand whether the problem is on your end (4xx) or the server's (5xx).
Access logs and load balancers record status codes constantly. Match a numeric code to its meaning to trace what actually happened on a request.
The 3xx class controls caching and navigation. Distinguish 301 (permanent) from 302/307 (temporary) to predict how browsers and crawlers will behave.
Handle the right codes in your own code — retry on 429 or 503, redirect on 301, and surface 401 vs 403 to users distinctly.
Each class follows the HTTP RFCs. Seeing the full 1xx–5xx spread makes the semantics of the protocol click faster than skimming a spec.
One click copies code + phrase, ready to paste into docs, commit messages, tests, or a teammate's chat without retyping.
A three-digit number a server returns with every response to tell the client how the request went. The first digit is the class; the last two give the specific outcome.
1xx is informational, 2xx success, 3xx redirection, 4xx client error, and 5xx server error. The tabs let you filter by any of these.
It matches your query against the code number, the reason phrase, and the description, case-insensitively. Searching 404, not found, or resource all surface the same card.
The code and its phrase are copied to your clipboard together — for example 404 Not Found — and a toast confirms the copy.
This guide lists the standard and commonly used codes, not every experimental or vendor-specific one in the IANA registry. Codes like 306 (unused) are intentionally omitted.
401 Unauthorized means authentication is missing or invalid — try logging in. 403 Forbidden means you're authenticated but still not allowed to access the resource.
No. The full code list and all search and filtering run locally in JavaScript. Nothing you type is sent to, stored on, or logged by any server.