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Web UtilitiesIPv4/IPv6 Converter
Convert and validate IPv4 and IPv6 addresses with detailed information.
Real-time validation and conversion as you type
Enter an IPv4 or IPv6 address to see validation results and conversion information.
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About IPv4/IPv6 Converter
What It Does
This tool helps you work with IP addresses by validating, converting, and analyzing both IPv4 and IPv6 formats.
Features
- Validate IPv4 addresses (e.g., 192.168.1.1)
- Validate IPv6 addresses in all formats
- Convert IPv4 to IPv4-mapped IPv6
- Extract IPv4 from IPv4-mapped IPv6
- Normalize and compress IPv6 addresses
- Detect private/local addresses
Common Use Cases
- Network configuration and setup
- Validating user input in applications
- Understanding IP address formats
- Network troubleshooting
- IPv4 to IPv6 migration planning
- Learning about IP protocols
- API request analysis
Frequently Asked Questions
What is the difference between IPv4 and IPv6?
IPv4 uses 32-bit addresses (e.g., 192.168.1.1) and can represent about 4.3 billion unique addresses. IPv6 uses 128-bit addresses (e.g., 2001:0db8:85a3:0000:0000:8a2e:0370:7334) and can represent an virtually unlimited number of addresses. IPv6 was introduced to address IPv4 exhaustion.
What is IPv4 address format?
IPv4 addresses consist of four octets (0-255) separated by periods in dotted decimal notation. For example: 192.168.1.1. Each octet represents 8 bits, totaling 32 bits. This allows for 2^32 = 4,294,967,296 unique addresses.
What is IPv6 address format?
IPv6 addresses consist of eight groups of four hexadecimal digits separated by colons. Example: 2001:0db8:85a3:0000:0000:8a2e:0370:7334. Leading zeros in each group can be omitted (2001:db8:85a3:0:0:8a2e:370:7334), and consecutive zero groups can be replaced with :: (2001:db8:85a3::8a2e:370:7334).
How do I validate an IPv4 address?
An IPv4 address is valid if it contains exactly four decimal numbers (octets) separated by periods, and each number is between 0 and 255. Our tool automatically checks these conditions and displays validation results.
How do I validate an IPv6 address?
An IPv6 address is valid if it contains hexadecimal digits (0-9, a-f, A-F) grouped in segments separated by colons. Valid formats include full notation, compressed notation with leading zero omission, and double-colon (::) notation for consecutive zero groups. Our tool validates all these formats.
What does the :: notation mean in IPv6?
The :: notation (double colon) is a shorthand used to represent one or more consecutive groups of zeros in an IPv6 address. It can only be used once per address. For example, 2001:db8::1 is equivalent to 2001:0db8:0000:0000:0000:0000:0000:0001.
What is the localhost address in IPv4 and IPv6?
In IPv4, the localhost address is 127.0.0.1. In IPv6, the localhost address is ::1 (or 0000:0000:0000:0000:0000:0000:0000:0001 in full notation). Both refer to the local machine.
What does CIDR notation mean?
CIDR (Classless Inter-Domain Routing) notation represents an IP address along with its routing prefix. It is written as the IP address followed by a slash and a number indicating the number of bits in the prefix. Example: 192.168.1.0/24. This tool primarily focuses on address conversion and validation.
What are private IPv4 address ranges?
Private IPv4 addresses are reserved for use within private networks and are not routable on the public internet. The ranges are: 10.0.0.0 to 10.255.255.255 (10.0.0.0/8), 172.16.0.0 to 172.31.255.255 (172.16.0.0/12), and 192.168.0.0 to 192.168.255.255 (192.168.0.0/16).
What are private IPv6 address ranges?
Private IPv6 addresses are represented by the prefix fc00::/7. Unique Local Addresses (ULA) start with fc00:: or fd00::. Link-local addresses use the fe80::/10 prefix. These addresses are not routable on the public internet and are used for private networks.
Can I convert any IPv4 address to IPv6?
Not directly in a 1:1 manner, as IPv4 and IPv6 are different protocols. However, IPv4-mapped IPv6 addresses can represent IPv4 addresses within IPv6, using the format ::ffff:192.0.2.1. This tool handles address validation and provides information about both formats.
Are my IP addresses stored or shared?
No, all conversions and validations happen entirely in your browser using client-side JavaScript. Your IP addresses are never sent to any server, stored in databases, or shared with anyone. Your data remains completely private.