Regex Editor & Tester
Build, test, and debug regular expressions
Build, test, and debug regular expressions
Matches full IPv4 addresses in private or reserved ranges: 10.0.0.0/8, 172.16.0.0–172.31.255.255, 192.168.0.0/16, 169.254.0.0/16 link-local, and 127.0.0.0/8 loopback, with each octet validated as 0–255. Useful for filtering internal addresses from logs, validating network configurations, or excluding non-routable IPs from analytics and access controls.