Test your IPv6 connectivity

Runs in your browser. See whether your ISP, DNS, and network stack can reach IPv4-only, IPv6-only, and dual-stack endpoints — and get a simple readiness score.

Free IPv6 tester for networks and websites

W3Dudes IPv6 Tester helps you answer two questions: Does your current connection support IPv6? And is a website configured for IPv6 with correct DNS and reachability? Use it before launch, during migrations, or when troubleshooting dual-stack delays.

IPv6 connectivity test

Measure how your browser and ISP handle IPv4-only hosts, IPv6-only hosts, and dual-stack services. Ideal for home users, developers, and IT teams validating client networks.

Website IPv6 readiness

Audit any domain for A and AAAA records, IPv6 nameservers, MX over IPv6, glue, and HTTP checks — the same criteria operators use when declaring a site “IPv6 ready.”

Frequently asked questions

How do I test if my website is IPv6 ready?
Enter your domain in the “Is your site IPv6 ready?” tab and run tests. W3Dudes checks A and AAAA DNS records, IPv6 nameservers, MX over IPv6, glue records, and HTTP connectivity.
How do I test my IPv6 connectivity?
Open the “Our IPv6 Compatibility” tab and run connectivity tests. Your browser is checked for IPv4-only, IPv6-only, and dual-stack reachability, with a simple score out of 10.
What is an AAAA record?
An AAAA record maps a hostname to an IPv6 address, similar to an A record for IPv4. A website with a valid AAAA record can be reached over IPv6 when the network path supports it.
Why does IPv6 HTTP show a warning on some sites?
If a site has AAAA records but our server cannot open outbound IPv6 (common on shared hosting), HTTP over IPv6 may show WARN while DNS still proves the site is IPv6 capable.
Is this IPv6 tester free?
Yes. The W3Dudes IPv6 Tester is a free online tool for connectivity and website readiness checks.