networkDifficulty: 2/5
IPv4 Address Validator
Validate an IPv4 address with precise error reasons: wrong segment count, out-of-range octets, or ambiguous leading zeros. Runs entirely in your browser.
Four numbers from 0 to 255, separated by dots
How it works
- Type or paste an IPv4 address such as 192.168.1.1.
- Press Validate. Invalid input tells you exactly which rule failed.
- Valid addresses show the normalized form plus the numeric and binary representations.
Frequently Asked Questions
Why are leading zeros rejected?
Because 010 is interpreted as octal 8 by some systems and decimal 10 by others. Rather than silently choosing one, the input is refused as ambiguous.
What does the validator check?
Exactly four dot-separated parts, each a whole number from 0 to 255, with no leading zeros, no internal spaces and no extra characters.
Does it support IPv6?
Not yet — this tool is IPv4 only, and says so rather than guessing at IPv6 rules.