IPv4/IPv6 Compatibility Checker

Free online IPv4/IPv6 Compatibility Checker. No sign-up needed, and it runs in your browser.

Check whether a website, its DNS and its email work over IPv6 as well as IPv4 — and whether your own connection has IPv6.

How to use

  1. Add your text or file.
  2. Adjust the options if needed.
  3. Copy or download the result.