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Compress IPv6 addresses to their shortest RFC-compliant format by removing redundant zeros. Perfect for network configuration and address management.
Enter an IPv6 address to start conversion
Overview
Understand what the tool solves, how it works, and the boundaries of its data.
Enter an IPv6-looking value to view a longer form with zero-padded groups and a shorter form that removes leading zeros and may replace a run of zero groups with ::. For example, a fully expanded input such as 2001:0db8:0000:0000:0000:ff00:0042:8329 is displayed in compact form as 2001:db8::ff00:42:8329.
IPv6 addresses are written as groups of hexadecimal digits separated by colons. Text normalization can make an address easier to read or compare, but it does not change the address value when the input is valid and interpreted correctly.
This page performs only a basic check for a colon before attempting its text transformation. It does not comprehensively verify that the input has eight valid 16-bit groups, a legal compressed-zero position, or a valid embedded IPv4 form. A value may therefore produce output without being a valid IPv6 address.
The IETF's RFC 5952 describes a recommended canonical text representation, including lowercase hexadecimal and compressing the longest run of zero fields. The page's display result is not a guarantee of RFC 5952 conformance, nor does it check reachability, network assignment, firewall policy, or certificate configuration.
Guide
Follow the workflow and verify inputs and outputs with practical examples.
Use a single IPv6 text value. Leading and trailing whitespace is trimmed before the page processes it.
The compact result shortens zero groups; the full result shows groups padded to four characters. Copy the form required by your destination.
Before using output in a network rule, certificate, configuration, or security-sensitive setting, confirm the address with a trusted parser and the destination system's requirements.
:: stands in for a run of consecutive all-zero groups. In the example above, the three adjacent zero groups become one ::. RFC 5952 recommends compressing the longest run and does not use :: for just one zero group. Treat these as formatting conventions, not proof that an input was parsed correctly.
Use cases
See how the tool fits into real work and everyday tasks.
View zero-padded groups beside a compact form when reading a candidate address in notes or documentation.
Normalize the appearance of two address strings before checking them with a proper IPv6 parser.
Use the output as a formatting aid, then validate syntax and policy in the network product that will consume it.
Q&A
Find concise answers to common questions and confusing cases.
No. The page's input check is basic and does not validate all IPv6 syntax. Use a standards-aware parser or the target system.
The double colon represents one or more consecutive zero-valued groups. It can appear only once in a textual address because its number of omitted groups must be unambiguous.
Do not assume so. RFC 5952 is a recommended canonical format; this page performs a simple display transformation and does not guarantee full compliance, including special embedded IPv4 representations.
Notes
Review scope, result limitations, and important precautions before use.
This formatter is not a validator, DNS lookup, reachability test, or security review. The output cannot confirm that an address is assigned, reachable, permitted by a firewall, or correct for a certificate or production configuration. Validate both syntax and intended use with the system responsible for that configuration.
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