HTTP Status Codes Quick Reference Guide
Every HTTP response carries a three-digit status code that tells the client exactly what happened on the server. Whether you're building a REST API, debugging a 503 on production, or just trying to...
Source: DEV Community
Every HTTP response carries a three-digit status code that tells the client exactly what happened on the server. Whether you're building a REST API, debugging a 503 on production, or just trying to understand why your fetch call failed, knowing your status codes is non-negotiable. This guide covers all five status code families — 1xx through 5xx — with plain-English explanations, real-world HTTP response examples, and practical debugging tips for every major code. You'll also find a section at the end on how to choose the right status code when designing your own API. If you want to look up a code quickly without reading the whole article, jump straight to DevToolkit's HTTP Status Codes tool for an instant searchable reference. How HTTP Status Codes Are Structured HTTP status codes are three-digit integers grouped into five classes based on their first digit: 1xx — Informational: The request was received and processing is continuing. 2xx — Success: The request was successfully received
