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304
Redirection

304 Not Modified

The resource has not been modified since the last request.

Definition (RFC 9110)

HTTP status code 304 304 Not Modified is defined in RFC 9110 (HTTP Semantics), Section 15.4.5 — the current authoritative specification for HTTP semantics, published June 2022, which obsoletes the older RFC 7231 and RFC 2616.

Description

The 304 Not Modified status code indicates that the client's cached version of the resource is still valid. The server does not send the resource body, saving bandwidth.

This works with conditional headers like If-Modified-Since and If-None-Match (ETag).

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Related Status Codes

300
300 Multiple Choices
Multiple options are available for the requested resource; the client should choose one.
 301
301 Moved Permanently
301 Moved Permanently — URL has permanently moved to the new address in the Location header. Search engines update their index; link equity is preserved.
 302
302 Found
302 Found — temporary redirect. Unlike 301, search engines do not update the index and link equity is NOT passed to the new URL.
 303
303 See Other
The response to the request can be found under a different URL using a GET method.
 307
307 Temporary Redirect
The request should be repeated with another URI but the method must not change.
 308
308 Permanent Redirect
The resource has permanently moved and the request method must not change.

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