HTTP Headers Checker

Why Check Headers?

HTTP headers contain important information about server configuration, security settings, caching policies, and more.

Monitor Website Performance

Track response time, TTFB, DNS lookup time, and TCP connect time for your websites with 1-minute intervals.

Response time monitoring TTFB tracking 60 days of historical data
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Common HTTP Headers

Security Headers

Strict-Transport-SecurityEnforces HTTPS
X-Frame-OptionsPrevents clickjacking
Content-Security-PolicyPrevents XSS
X-XSS-ProtectionXSS filter

Caching Headers

Cache-ControlCaching directives
ETagResource version
Last-ModifiedLast change date
ExpiresExpiration date

Content Headers

Content-TypeMedia type
Content-LengthSize in bytes
Content-EncodingCompression
ServerServer software