IPv6 Address Validator

Enter any IPv6 address to check validity and see its full expanded form.

IPv6 address

ValidYes

Expanded2001:0db8:0000:0000:0000:0000:0000:0001

How to read the result

A valid IPv6 address has 8 groups of 1-4 hex digits, with at most one :: compression. Embedded IPv4 tails like ::ffff:192.0.2.1 are also accepted.

Example

2001:db8::1 → valid, expanded 2001:0db8:0000:0000:0000:0000:0000:0001

FAQ

Why is my address invalid?

Usually two :: sequences, more than 8 groups, or non-hex characters.

Are uppercase hex digits OK?

Yes. Hex is case-insensitive; output uses lowercase.

Is my input sent anywhere?

No. Validation runs entirely in your browser.