pjhtech Tools
Address planning

IPv6 Address Expander and Compressor

Normalize IPv6 text and inspect all eight hexadecimal groups.

Input

Reset restores the example inputs.

Local calculation · inputs are not sent to a server.

Result

Calculating the example…

Paste an IPv6 address without a prefix or interface zone. Copy Compressed for the compact form, or Expanded to compare all eight groups. Both represent the same address.

Example: 2001:0db8:0000:0000:0042:0000:0000:0001 becomes 2001:db8::42:0:0:1.

Embedded dotted IPv4 is accepted and displayed as hexadecimal groups. Use the IPv6 subnet calculator for an address with a /prefix.

References