This http status codes reference lets you search 38 common response codes and 44 MIME content types from one fast, searchable list. Type a number like 404 or 301, a phrase like "not found", or a file extension like .png or application/json, and the matching entries appear instantly with one-click copy. It is built for web developers, backend engineers, and QA testers who need to confirm what a 422 means, pick the right content-type for a response header, or find the MIME for an upload. Status codes are grouped and color-coded by class (2xx, 3xx, 4xx, 5xx) so you can scan http response codes at a glance, and a quick tab switch jumps you to the MIME types list. Everything runs locally in your browser, so your searches are processed on your device.
Features
Search HTTP status codes by number, like 404 or 503
Search by phrase, such as "not found" or "gateway timeout"
Status codes color-coded by class: 2xx, 3xx, 4xx, 5xx
Browse and filter MIME content types by extension or type
Look up MIME types by file extension like .png or .svg
Copy any status code or MIME string with one click
Toggle between HTTP Status Codes and MIME Types tabs
How to use the HTTP Status & MIME Types
Choose the HTTP Status Codes or MIME Types tab.
Type a code, phrase, or file extension into the search box.
Scan the filtered results, grouped by class for status codes.
Click the copy button to grab the code or MIME string.
Example
Input
404
Output
404 Not Found (4xx)
Searching 404 returns the status code, its text, and its class.
Common errors & troubleshooting
Searching for a code returns nothing. — Make sure you are on the HTTP Status Codes tab, not MIME Types. The list holds 38 common codes, so rarer standard ones such as 412, 416 or 431 are not in it.
A file extension search shows no MIME type. — Switch to the MIME Types tab and try the extension with or without the leading dot, or search by the type name like application/json instead.
Expecting a non-standard code like 419 or 599. — This reference lists common codes from the official IANA registry only; framework- or CDN-specific codes outside the spec are not included.
Searching "Payload Too Large" or "Unprocessable Entity" finds nothing. — The list uses the current RFC 9110 names: 413 is Content Too Large and 422 is Unprocessable Content. Search by number, or by a word the old and new names share, such as "too large" or "unprocessable".
Frequently asked questions
What is the HTTP status codes reference?
It is a searchable lookup of 38 common HTTP status codes and 44 MIME content types. Type a number, phrase, or file extension and matching entries appear instantly with one-click copy.
What does HTTP status code 404 mean?
404 Not Found means the server could not find the requested resource. Search 404 in this HTTP status reference to see its text and 4xx class.
How do I find the right MIME content-type for a file?
Switch to the MIME Types tab and search by file extension like .png or .svg, or by the type name. Then copy the exact content-type string for your response header.
What is the difference between 4xx and 5xx status codes?
4xx codes indicate client errors, such as a bad request or missing resource, while 5xx codes indicate server errors. This reference color-codes both classes so you can tell them apart at a glance.
Can I search status codes by name instead of number?
Yes. Type a phrase like "gateway timeout" or "unauthorized" and the matching status codes appear, so you do not need to remember the exact number.
Does this HTTP reference send my searches anywhere?
No. The HTTP status codes reference runs entirely in your browser. Your searches never leave your device.
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