Binary to IPv6 Converter

IPv6 addresses are 128-bit identifiers written as eight colon-separated groups of four hexadecimal digits. Miscounting a single bit during manual conversion flips an entire hex nibble, routing traffic to an unintended host or black-holing it entirely. This tool parses raw binary input - continuous, space-delimited, dot-separated, or colon-grouped - strips formatting characters, validates the length against the 128-bit ceiling, and maps each 16-bit block to its hexadecimal equivalent via parseInt(block, 2). It then applies RFC 5952 compression rules: leading zeros within each group are removed, and the longest run of consecutive all-zero groups collapses into a single :: token. Inputs shorter than 128 bits are right-padded with zeros, matching how partial prefixes behave in real routing tables.

The converter assumes well-formed binary digits only (0 and 1). It does not infer intent from ambiguous separators. If your source material already contains hex characters, use a hex-to-IPv6 formatter instead. Pro tip: when debugging firewall rules or ACLs, always verify the full expanded form before applying compression - two different compressed notations can hide the same address, but two different expanded forms never can.

An IPv6 address is a 128-bit unsigned integer. The conversion from binary to colon-hex notation proceeds in three stages: grouping, base conversion, and optional compression.

Each 16-bit group G_i converts to a 4-digit hexadecimal value:

where b_j ∈ {0, 1} is the bit at position j (bit 15 is the MSB within each group). The decimal result is then expressed in base 16.

RFC 5952 compression rules: (1) remove leading zeros from each group (00a1 → a1); (2) replace the longest contiguous sequence of all-zero groups with ::; (3) if two sequences of equal length exist, replace only the leftmost.

Where b = raw binary string, G_i = the i-th 16-bit group (i ∈ [1, 8]), hex = base-16 conversion function, and j = bit index within each group.