Look up any HTTP status code and its meaning in one searchable list, from the informational 1xx range through success, redirection, client errors and server errors. When you are debugging an API and a response comes back 409, 422 or 451, a quick reminder of what the code signals saves a trip to the spec. This reference lists the standard codes with their official reason phrases and a short description of when each applies, and you can filter the whole table instantly by typing a number or keyword. Type a code like 404 or a word like redirect to narrow the list. Everything is bundled into the page, so it works offline and makes no external requests at all.