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IPv4 to IPv6 Converter

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Network & IP

IPv4 to IPv6 Converter

Convert IPv4 addresses to IPv6 format.

Workspace

Run the tool here

Browser utility

Output

Run the workspace to see the response here.

How to use

Enter an IPv4 or IPv6 address.
Choose the conversion direction.
Copy the expanded or mapped form.

About this tool

Convert IPv4 addresses to IPv6-mapped forms and expand compressed IPv6 addresses to their full notation.

IPv4 to IPv6 Converter is part of the TmpMailer Network & IP set — free browser utilities that open instantly, need no account, and pair well with a temporary-email workflow when you just need a quick result.

Common use cases

Reading an IPv6 address from a log.
Configuring a dual-stack service.
Checking an IPv4-mapped address.

Common questions

Is an IPv4-mapped address the same as IPv4?

It represents the same host inside an IPv6 stack, but routing and firewall rules may treat it differently.

Why does IPv6 use hexadecimal?

128-bit addresses are shorter and less error-prone in hex groups than in decimal.

Can every IPv4 address be mapped?

Yes, into the ::ffff:0:0/96 range. That does not make the host reachable over IPv6.

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