IPv4/IPv6 Converter

An IPv4-mapped IPv6 address represents an IPv4 address within the IPv6 address space using the format ::ffff:a.b.c.d. This format is defined in RFC 4291 and is commonly used by dual-stack applications that need to handle both IPv4 and IPv6 connections through a single socket interface.

A 6to4 address is a transition mechanism defined in RFC 3056 that allows IPv6 packets to be transmitted over an IPv4 network. These addresses use the 2002::/16 prefix followed by the IPv4 address encoded in hexadecimal. While useful for transition scenarios, 6to4 is being deprecated in favor of native IPv6 connectivity.

The tool identifies multiple IPv6 address types including Global Unicast (2000::/3), Link-Local (fe80::/10), Unique Local Address (fc00::/7), Multicast (ff00::/8), Loopback (::1), IPv4-Mapped, 6to4 Transition, Teredo Tunneling, and Documentation addresses. It also indicates the scope such as global, link-local, or organization-local.

Full form IPv6 shows all eight 16-bit groups with leading zeros, such as 2001:0db8:0000:0000:0000:0000:0000:0001. Compressed form removes leading zeros from each group and replaces the longest consecutive sequence of all-zero groups with ::, resulting in 2001:db8::1. Both represent the same address.

No, all conversions happen entirely in your browser using JavaScript. Your IP addresses are never transmitted to any server. This makes the tool safe for analyzing internal network addresses or sensitive infrastructure information without any privacy concerns.