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Website server time

Check the time a website reports in its HTTP response.

Enter a public HTTPS domain without a path or port.

github.comHTTP Date · seconds only
Server response time--:--:--

Ready to check a site.

Your device--:--:--
Cloudflare reference--:--:--
Estimated difference range-

The site reports time in an HTTP Date header, which has one-second resolution. The displayed range allows for that resolution and network delay; a difference as small as 0.000001 second cannot be measured here. A CDN may supply the header instead of the origin server. This is not a ticketing or reservation guarantee.

What time is measured

The tool reads the HTTP Date header returned by a public HTTPS site. A CDN may answer on behalf of the origin server, so the value might be the CDN’s clock.

Second-level precision

The HTTP header has one-second resolution. Read the estimated difference range, which also accounts for network delay. This cannot measure a microsecond difference or guarantee a ticketing site’s clock.

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