HTTP Status Codes
Look up any HTTP status code with a plain-language explanation. Useful for debugging, API docs, and interview prep.
No matching status code.
How to Use
Search by code (e.g. 404), name (Not Found), or description text. Use the 1xx–5xx chips to scope by category.
Click a card to expand the description. Code and name are copy-on-click.
2xx green, 3xx blue, 4xx amber, 5xx red — at-a-glance category recognition.
FAQ
Which codes are included?
IANA-registered standard codes (RFC 9110), plus WebDAV (207, 422, …) and common non-standards (418, 499).
404 vs 410?
404 means "not found (maybe temporary)"; 410 means "gone permanently". SEO-wise, 410 makes search engines drop the URL faster.
When to use 422 Unprocessable Entity?
Syntax is fine but semantics aren't (e.g. failing validation rules). Clearer than 400 for form-validation errors.
Which redirect status?
301 (permanent, affects SEO), 302 (temporary), 303 (force POST→GET), 307 (temporary, keep method), 308 (permanent, keep method).
Is anything sent to a server?
No. The codes are bundled with the page; nothing leaves your browser.
