What does IPv6 Compress do that other Network pages on this site do not?

Strip leading zeros and collapse the longest zero run with ::. Invalid input fails. Short version: Compress an expanded IPv6 address.

Does IPv6 Compress upload my file or text to Tool-You servers?

No. IPv6 Compress runs in this browser tab. Files stay on the device. Limit note: Parsable IPv6 (compressed or expanded).

Should I use IPv4↔IPv6 Convert instead of IPv6 Compress?

Use IPv6 Compress when you need Compress an expanded IPv6 address. Use IPv4↔IPv6 Convert when you need Map between IPv4 and IPv4-mapped IPv6. They share a category (Network) but not the same job.

What are the limits of IPv6 Compress?

Parsable IPv6 (compressed or expanded). Also: Strip leading zeros and collapse the longest zero run with ::. Invalid input fails.

IPv6 Compress

Compress an expanded IPv6 address.

Strip leading zeros and collapse the longest zero run with ::. Invalid input fails.

What IPv6 Compress does

Strip leading zeros and collapse the longest zero run with ::. Invalid input fails.

Practical limit for IPv6 Compress: Parsable IPv6 (compressed or expanded). That is why output can differ from heavy desktop Network software. Read the tool-specific note again: Strip leading zeros and collapse the longest zero run with ::. Invalid input fails.

How to use IPv6 Compress

Keep this tab on IPv6 Compress (/network/ipv6-compress). Pasting into the wrong Network tool (for example IPv4↔IPv6 Convert) changes the job.
Paste or type the input IPv6 Compress expects. Path hint: network · ipv6 compress. Compress an expanded IPv6 address.
Apply the IPv6 Compress action only. Is IPv6 is a different transform (IPv6 validity plus normalized host.). Strip leading zeros and collapse the longest zero run with ::. Invalid input fails.
Copy the output of IPv6 Compress if you need it elsewhere. Size/complexity still follows: Parsable IPv6 (compressed or expanded).
If the text job is actually Map between IPv4 and IPv4-mapped IPv6., leave IPv6 Compress and open IPv4↔IPv6 Convert.

When not to use IPv6 Compress

Skip IPv6 Compress when a neighbor tool matches better — start with IPv4↔IPv6 Convert or Is IPv6 — or when the description already warns the job will fail. In the tool’s own words: Strip leading zeros and collapse the longest zero run with ::. Invalid input fails.

Questions about IPv6 Compress

What does IPv6 Compress do that other Network pages on this site do not?: Strip leading zeros and collapse the longest zero run with ::. Invalid input fails. Short version: Compress an expanded IPv6 address.
Does IPv6 Compress upload my file or text to Tool-You servers?: No. IPv6 Compress runs in this browser tab. Files stay on the device. Limit note: Parsable IPv6 (compressed or expanded).
Should I use IPv4↔IPv6 Convert instead of IPv6 Compress?: Use IPv6 Compress when you need Compress an expanded IPv6 address. Use IPv4↔IPv6 Convert when you need Map between IPv4 and IPv4-mapped IPv6. They share a category (Network) but not the same job.
What are the limits of IPv6 Compress?: Parsable IPv6 (compressed or expanded). Also: Strip leading zeros and collapse the longest zero run with ::. Invalid input fails.