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HTTP/3Verify

Does your site speak HTTP/3?

Run an instant check below, or verify yourself in the browser.

HTTP/3 check

Other Ways To Check

01

Online checker

Use a public HTTP/3 checker such as http3check.net and enter your hostname.

02

Chrome extension

The “HTTP/2 and SPDY Indicator” extension shows h3 when a page loads over HTTP/3.

03

Firefox DevTools

Open the Network tab and enable the Protocol column — HTTP/3 shows as “HTTP/3”.

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