IPv4 to IPv6 Converter & IPv6 Formatter
Translate IPv4 addresses to IPv4-mapped IPv6 and 6to4 tunnels, and expand or compress IPv6 addresses.
About This Tool
IPv4 to IPv6 Converter bridges legacy IPv4 addresses with modern IPv6 infrastructure, generating IPv4-mapped notation, 6to4 tunnel prefixes, and providing RFC 5952 zero-compression and full 8-hextet expansion.
Key Features
IPv4-mapped IPv6 generation (dotted and hex)
6to4 tunnel address prefix calculation
Full 8-hextet IPv6 expansion with leading zero padding
RFC 5952 IPv6 zero-compression (:: notation)
How to Use
- 1Enter an IPv4 address to view IPv4-mapped IPv6 and 6to4 prefix formats.
- 2Enter an IPv6 address to expand full 8 hextets or compress consecutive zeros using RFC 5952 notation.
Why Use ToolSnippet IPv4 to IPv6 & IPv6 Expander/Compressor?
Crucial for dual-stack server configuration, IPv6 migration, and log normalization.
Handles both dotted-decimal and hexadecimal representations.
Tips for Best Results
- Use RFC 5952 compressed format for consistent storage and display in databases and configuration files
Frequently Asked Questions
What is an IPv4-mapped IPv6 address?
An IPv4-mapped IPv6 address (e.g. ::ffff:192.168.1.1) allows IPv6 applications to communicate directly with IPv4 endpoints over dual-stack network sockets.
Related Tools
All Encoding & Decoding Utilities →Base62 URL Shortener & Number Encoder
Convert base-10 integers into compact alphanumeric Base62 strings [0-9a-zA-Z] for URL shorteners and compact database IDs.
Base58 Encoder & Decoder
Encode and decode text strings using Bitcoin, IPFS, and Solana Base58 format.
Base64 Encoder/Decoder
Encode and decode Base64 text quickly.