HTTP Headers

Common HTTP headers explained with syntax, examples, and common values.

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AcceptRequestRequest

Accept-EncodingRequestRequest

Accept-LanguageRequestRequest

AuthorizationRequestRequest

CookieRequestRequest

HostRequestRequest

RefererRequestRequest

User-AgentRequestRequest

Set-CookieResponseResponse

LocationResponseResponse

ServerResponseResponse

WWW-AuthenticateResponseResponse

Retry-AfterResponseResponse

Content-Security-PolicyResponseSecurity

Strict-Transport-SecurityResponseSecurity

X-Content-Type-OptionsResponseSecurity

X-Frame-OptionsResponseSecurity

X-XSS-ProtectionResponseSecurity

Permissions-PolicyResponseSecurity

Cache-ControlBothCaching

ETagResponseCaching

If-None-MatchRequestCaching

If-Modified-SinceRequestCaching

Last-ModifiedResponseCaching

ExpiresResponseCaching

AgeResponseCaching

Access-Control-Allow-OriginResponseCORS

Access-Control-Allow-MethodsResponseCORS

Access-Control-Allow-HeadersResponseCORS

Access-Control-Expose-HeadersResponseCORS

Access-Control-Max-AgeResponseCORS

OriginRequestCORS

Content-TypeBothRepresentation

Content-LengthBothRepresentation

Content-EncodingBothRepresentation

Transfer-EncodingBothRepresentation

Related Guides

HTTP Status Codes

HTTP Methods

MIME Types

CORS Explained

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