HTTP 304 Not Modified

Good to know

• Sent in reply to conditional requests (If-None-Match, If-Modified-Since).

Example response

HTTP/1.1 304 Not Modified

Look up the headers shown here in the HTTP headers reference.

Common questions

What does HTTP 304 mean?

Not Modified. Your cached copy is still good. The server sends no body.

When should I use 304?

Sent in reply to conditional requests (If-None-Match, If-Modified-Since).

Is 304 an error?

No. 3xx codes are redirection responses: Further action is needed to complete the request, usually following a Location header.

Other 3xx codes