503 Service Unavailable
The HyperText Transfer Protocol (HTTP)
503 Service Unavailable server error response code indicates that the server is not ready to handle the request.Common causes are a server that is down for maintenance or that is overloaded. This response should be used for temporary conditions and the
Retry-After HTTP header should, if possible, contain the estimated time for the recovery of the service.Note: together with this response, a user-friendly page explaining the problem should be sent.
Caching-related headers that are sent along with this response should be taken care of, as a 503 status is often a temporary condition and responses shouldn't usually be cached.
Status
503 Service Unavailable
Specifications
| Specification |
|---|
| Hypertext Transfer Protocol (HTTP/1.1): Semantics and Content # status.503 |
Browser compatibility
Report problems with this compatibility data on GitHubChrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on iOS | Samsung Internet | |
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Legend
Full support