Free online IPv4/IPv6 address converter. Convert IPv4 to IPv6 (IPv4-mapped addresses), IPv6 to IPv4 (when applicable), abbreviate/expand IPv6 addresses, validate IP address formats. Pure frontend processing. Perfect for network engineers, sysadmins and developers.
Enter Content: Type, paste, or upload the content you want to process. All processing happens locally in your browser — no data is uploaded to any server.
Configure Options: Adjust available options and settings to customize the output format.
Get Results: Copy the result or download the file once processing is complete. All processing is done locally — no data is uploaded to any server.
An IPv4-mapped IPv6 address embeds an IPv4 address into IPv6 format: ::ffff:x.x.x.x. This mechanism enables IPv6 networks to communicate with IPv4-only systems. For example, 192.168.1.1 becomes ::ffff:192.168.1.1 or 0000:0000:0000:0000:0000:ffff:c0a8:0101.
IPv6 addresses are 128-bit, represented as 8 groups of 4 hex digits (e.g., 2001:0db8:0000:0000:0000:ff00:0042:8329). Full format has 39 characters — hard to remember and type. Abbreviation removes leading zeros and replaces consecutive zero groups with :: (e.g., 2001:db8::ff00:42:8329). Converting between formats is essential for network configuration.
No. Only IPv4-mapped addresses (::ffff:0:0/96 range) and IPv4-compatible addresses (::0:0/96 range) can convert to IPv4. Regular global unicast IPv6 addresses (like 2001:db8::1) have no corresponding IPv4 address and cannot be directly converted.
IPv4: 32-bit address, ~4.3 billion addresses, dotted-decimal format (e.g., 192.168.1.1), widely deployed globally. IPv6: 128-bit address, ~3.4×10^38 addresses, colon-hex format (e.g., 2001:db8::1), designed to solve IPv4 address exhaustion with better security and auto-configuration.
No. Everything runs locally in your browser. Your IP addresses never leave your device. All format conversion and validation happens locally.