IPv6 to IPv4 Converter
Extract the IPv4 address from an IPv4-mapped IPv6 address (::ffff:x.x.x.x). If you have a string in that form — from a log, API, or config — we give you back the dotted IPv4. Only IPv4-mapped IPv6 can be reduced to IPv4; native IPv6 cannot. Conversion runs in your browser.
Extract IPv4 from IPv6
Enter an IPv4-mapped IPv6 address (::ffff:...).
What Is IPv6 to IPv4 Conversion?
IPv4-mapped IPv6 addresses look like ::ffff:192.168.1.1 — they’re the IPv4 address embedded in the IPv6 space. “IPv6 to IPv4” here means taking that string and giving you back the plain IPv4 (192.168.1.1). Not every IPv6 address has an IPv4 equivalent; only the IPv4-mapped form does. Native IPv6 (e.g. 2001:db8::1) can’t be turned into a single IPv4 address.
To go the other way (IPv4 → IPv4-mapped IPv6), use our IPv4 to IPv6 converter. For decimal or hex conversion of an IPv4, use IP format converter. To validate an address, use IP address validator.
How to Use the IPv6 to IPv4 Converter
Paste or type an IPv4-mapped IPv6 address (must start with ::ffff:). The dotted IPv4 appears below. Use IP lookup if you then want location or ISP for that IPv4, or reverse DNS lookup for the hostname.
Features
- Extracts IPv4 from ::ffff:x.x.x.x (or ::ffff:hex:hex)
- Instant; runs in browser
- No signup, no data sent
- Clear error when input isn’t IPv4-mapped
Why Use This Tool
When logs or APIs give you IPv6 strings and your next step needs dotted IPv4. Combine with subnet calculator or ping test once you have the IPv4.
FAQs
What is IPv6 to IPv4 conversion?
Here we mean extracting the IPv4 address from an IPv4-mapped IPv6 address (::ffff:x.x.x.x). The result is the dotted IPv4. Only IPv4-mapped addresses can be reduced to IPv4.
Can any IPv6 be converted to IPv4?
No. Only IPv4-mapped IPv6 (::ffff:a.b.c.d) has a direct IPv4 equivalent. Native IPv6 addresses (e.g. 2001:db8::1) are not convertible to IPv4.
When would I use this?
When you have an IPv4-mapped IPv6 string (e.g. from a log or API) and need the plain IPv4 for a tool or config that expects dotted IPv4.
Is the converter free?
Yes. Conversion runs in your browser. No signup.
How do I convert IPv4 to IPv6?
Use our IPv4 to IPv6 converter to get the ::ffff:x.x.x.x form from a dotted IPv4 address.