How to check if my browser supports HTTP/3?

Use our free HTTP/3 browser check tool to test if your browser supports HTTP/3 and QUIC protocols. Simply visit our site and run the test. Modern browsers like Chrome, Firefox, and Edge support HTTP/3 and QUIC protocols.

A QUIC test verifies if a server or browser supports the QUIC protocol, which powers HTTP/3 connections. Our QUIC test tool checks protocol support, connection performance, and QUIC handshake capabilities.

How do I test HTTP3 online?

To test HTTP3 online, simply enter your domain name in our HTTP/3 check tool above. Our tool will verify if your website supports HTTP/3 and QUIC protocols and provide detailed connection metrics.

HTTP/3 Check - QUIC Browser Test

Test your website and browser for HTTP/3 and QUIC protocol support online - Free browser check tool

Public HTTPS endpoints on port 443 only. Checks are rate limited; please wait if the checker is busy. TLS certificates must be valid.

google.com

check_circle QUIC is advertised or negotiated

check_circle HTTP/3 is advertised or negotiated

HTTP/3 was advertised in the response headers or negotiated for this check. The negotiated protocol was HTTP/3. This check does not measure QUIC connection IDs, packet timing or 0-RTT.

HTTP/3 Server Information

HTTP Version: HTTP/3

Server: gws

Status Code: 301

Response Time: 53.95 ms

Response Headers

Header	Value
location	https://www.google.com/
content-type	text/html; charset=UTF-8
content-security-policy-report-only	object-src 'none';base-uri 'self';script-src 'nonce-g30z0WY0EIQnwdrS_0ELMg' 'strict-dynamic' 'report-sample' 'unsafe-eval' 'unsafe-inline' https: http:;report-uri https://csp.withgoogle.com/csp/gws/other-hp
date	Mon, 02 Nov 2026 17:54:16 GMT
expires	Wed, 02 Dec 2026 17:54:16 GMT
cache-control	public, max-age=2592000
server	gws
content-length	220
x-xss-protection	0
x-frame-options	SAMEORIGIN
alt-svc	h3=":443"; ma=2592000,h3-29=":443"; ma=2592000