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IPv6 Toolkit: Convert, Validate and Subnet IPv6 Addresses

Use the converter for expanded/compressed/binary/PTR forms, the validator to check lists of addresses, and the subnet calculator to split a /48 or /56 into /64 networks.

Inder Kochar
Inder KocharSystems & Network Engineer Updated 1 min read Beginner

IPv6 addresses are long and easy to mistype, and subnetting them by hand is impractical. These tools handle the maths and formatting in your browser.

IPv6 address converter

Expand or compress an address (RFC 5952), and see it as binary, decimal, hex groups and its ip6.arpa reverse-DNS name.

Runs in your browser – nothing is sent or stored.

Open the full tool page – guide and FAQ →

IPv6 validator

Paste one address or a whole list to check which are valid and what type each is.

Runs in your browser – nothing is sent or stored.

Open the full tool page – guide and FAQ →

IPv6 subnet calculator

Enter the prefix from your ISP and split it into /64 LANs or per-site /56s.

Runs in your browser – nothing is sent or stored.

Open the full tool page – guide and FAQ →

Learn the essentials

Address types, special prefixes, prefix sizes and handy commands are on one page: the IPv6 cheat sheet.

Inder Kochar

Written by

Inder Kochar

Systems & Network Engineer – I write up the fixes I use with clients, tested on real systems. Stuck on something similar?

Ask me for help → About me

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