Expand or compress IPv6 addresses, validate syntax, detect scope (global, link-local, loopback), and view binary hextets. Free browser tool — no sign-up.
Added Jun 1, 2026
Input
Result
Enter a value for ipv6 address to see your result.
Expand compressed IPv6 addresses to full form, compress expanded addresses, validate syntax, detect scope (loopback, link-local, global unicast), and show a per-hextet binary map — all in the browser.
RFC 3849 documentation prefix in canonical compressed form.
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Result
fe80::/10 addresses are valid only on the local link segment.
Inputs
Result
Double colon (::) replaces one contiguous run of zero hextets. 2001:db8::1 means 2001:0db8:0000:0000:0000:0000:0000:0001. Only one :: is allowed per address.
Addresses in fe80::/10 are link-local — they are only routable on the same Layer 2 segment (like 169.254.x.x in IPv4). They are auto-configured and used for neighbor discovery.