425 Too Early

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This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The HyperText Transfer Protocol (HTTP) 425 Too Early response status code indicates that the server is unwilling to risk processing a request that might be replayed, which creates the potential for a replay attack.

Status

425 Too Early

Specifications

Specification Title
RFC 8470, section 5.2: 425: Early Data Using Early Data in HTTP

Browser compatibility

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
425Chrome ? Edge ? Firefox Full support 58IE ? Opera ? Safari ? WebView Android ? Chrome Android ? Firefox Android Full support 58Opera Android ? Safari iOS ? Samsung Internet Android ?

Legend

Full support  
Full support
Compatibility unknown  
Compatibility unknown