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ProgrammerKit

IPv4 ↔ IPv6 Converter

Convert IPv4 addresses to IPv6-mapped form and back.

Free · Runs in your browser · Last updated

About this tool

Convert IPv4 to IPv4-mapped IPv6 (::ffff:a.b.c.d) and back, with hex / decimal representations.

Privacy

All processing for IPv4 ↔ IPv6 happens locally inside your browser using JavaScript. Your input is never uploaded to a server, logged, or shared with third parties.

Frequently asked questions

Is the IPv4 ↔ IPv6 free to use?

Yes. IPv4 ↔ IPv6 is completely free for both personal and commercial projects. There are no usage limits, no sign-up, and no premium tier.

Is my data safe when I use IPv4 ↔ IPv6?

All processing happens locally in your browser using JavaScript. Your input is never uploaded to our servers, logged, or shared with any third party.

Does IPv4 ↔ IPv6 work offline?

Once the page has loaded, the tool runs entirely client-side. You can disconnect from the internet and it will keep working in the same browser tab.

Which browsers are supported?

IPv4 ↔ IPv6 works in all modern browsers, including the latest versions of Chrome, Firefox, Safari, Edge, Brave, and Opera, on desktop and mobile.

Do I need to install anything?

No. IPv4 ↔ IPv6 runs in any modern web browser with no installation, browser extension, or account required.

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