IP Address Validator
Check whether a string is a valid IPv4 or IPv6 address. Handy for forms, scripts, or configs. Validation runs in your browser — nothing is sent to a server.
Validate an IP
Enter an IP address to check if it’s valid IPv4 or IPv6.
What Is an IP Address Validator?
An IP address validator checks whether a string is a valid IPv4 or IPv6 address. IPv4 has four dot-separated numbers (0–255). IPv6 has groups of hex digits separated by colons, with rules for shortening. Valid doesn’t mean “reachable” — it only means the format is correct. To see if an IP is reachable or get its location, use our IP lookup or ping test. For your own IP, use What is my IP.
How to Use the IP Address Validator
Type or paste an IP into the box above. The result updates as you type: valid IPv4, valid IPv6, or invalid. No button to click; nothing is sent to our servers. For subnet math (network/broadcast), use our subnet calculator. For hostname (reverse DNS), use reverse DNS lookup; for location, use IP location finder or IP to country.
Features
- Validates IPv4 and IPv6
- Instant feedback; runs in browser
- No signup, no data sent
- Useful for forms and scripts
Why Use This Tool
Developers use it to validate user input or config. Scripts use it before calling APIs. Pair with DNS lookup when checking domain records, or traceroute tool for path checks.
FAQs
What is a valid IPv4 address?
Four numbers 0–255 separated by dots (e.g. 192.168.1.1). Each part must be a number in that range.
What is a valid IPv6 address?
Groups of hex digits separated by colons (e.g. 2001:db8::1). Shortened forms like :: for runs of zeros are allowed.
Are private IPs valid?
Yes. Private ranges (10.x, 172.16–31.x, 192.168.x) are valid; they’re just not routable on the public internet.
Is the IP validator free?
Yes. Validation runs in your browser. No signup, no data sent.
Can I validate a whole list?
This tool validates one IP at a time. For bulk checks, use our IP lookup for live lookups one by one.