Look up any HTTP status code to learn what it means. Enter a code like 404, or search by name, to see its category and a plain-English explanation.
How to Use
- Type a status code (such as 404) or a search term (such as timeout).
- Click Look Up, or press Enter, to see the result.
- For a search, select one of the matching codes to see its details.
- Use the common-code chips for quick one-click lookups.
Key Features
- 55 status codes — from 100 Continue to 511 Network Authentication Required.
- Plain-English explanations — every code explained without jargon.
- Category badges — see at a glance whether it is informational, successful, a redirect, a client error or a server error.
- Search by name — find codes by typing what they are about.
- 100% private — runs entirely in your browser; nothing is sent or stored.
FAQs
What are HTTP status codes?
They are three-digit numbers a server sends with every response to say what happened: 2xx means success, 3xx means redirect, 4xx means the client did something wrong and 5xx means the server failed.
What is the difference between 301 and 302?
A 301 is a permanent redirect — browsers and search engines should remember the new address. A 302 is temporary, so the original address stays valid.
Why do I keep seeing 404?
The page may have been moved or deleted, or the address was mistyped. Check the URL, or use the site’s search to find the new location.
What should I do about a 500 error?
A 500 error is the website’s problem, not yours. Wait a little while and try again; if it persists, contact the site owner.
Related Tools
Try these related tools: URL Encoder/Decoder, HTML Entity Lookup and Timestamp Converter.