Developer Utility
IPv6 Expand / Compress Tool
Expand shorthand IPv6 addresses and compress full forms for readability.
Language: TextUtility: ConvertUtility: FormatUtility: Inspect
Input: 2001:db8::1 Expanded: 2001:0db8:0000:0000:0000:0000:0000:0001 Compressed: 2001:db8::1
What This Tool Does
Convert IPv6 addresses between expanded and compressed forms for clean diagnostics and config work.
Use it to inspect or transform input quickly, then carry validated output into code, tests, or API requests.
Common Use Cases
- Normalize IPv6 addresses across documentation and configs.
- Expand shorthand to inspect individual hextets.
- Compress fully expanded addresses for concise output.
Common Pitfalls
- Invalid shorthand placement (multiple ::) is not valid IPv6.
- IPv4-mapped IPv6 variants may require manual review in some stacks.
FAQ
Will this preserve address value exactly?
Yes, expansion/compression keeps the same numeric address.
Can I paste uppercase hextets?
Yes, input is normalized to lowercase output.
Does this tool send data to a backend?
Most tools process input client-side in your browser unless explicitly noted.