A free online IPv4 to IPv6 converter with four modes. IPv4 to IPv6: convert any IPv4 address to IPv4-mapped (::ffff:x.x.x.x), IPv4-compatible (::x.x.x.x), hex, and decimal formats. IPv6 to IPv4: extract embedded IPv4 addresses from IPv6 addresses like ::ffff:192.168.1.1. Expand IPv6: convert compressed IPv6 notation to full 8-group format. Compress IPv6: shorten IPv6 addresses using :: zero compression. All conversion is local and instant.
Choose a conversion mode (IPv4→IPv6, IPv6→IPv4, Expand, Compress).
Enter the IP address in the appropriate format.
View all converted formats instantly.
Copy any result with the copy button.
An IPv4-mapped IPv6 address (::ffff:x.x.x.x) is used to represent an IPv4 address in an IPv6 format. This is commonly used in dual-stack applications where an IPv6 socket communicates with an IPv4 host.
Only IPv6 addresses in the ::ffff:x.x.x.x or ::x.x.x.x format contain embedded IPv4 addresses. Native IPv6 addresses (e.g., 2001:db8::1) cannot be converted to IPv4 as they are different address spaces.
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