IP Address Regex Tester
Test and validate ip patterns with this specialized regex tester. Includes tested patterns and real-time matching.
Recommended Ip Pattern
``regex
^(?:(?:25[0-5]|2[0-4]\d|[01]?\d\d?)\.){3}(?:25[0-5]|2[0-4]\d|[01]?\d\d?)$
`
Test Examples
Valid matches:
- 192.168.1.1
10.0.0.255255.255.255.00.0.0.0
Invalid (should not match):
256.1.1.1192.168.1192.168.1.1.1192.168.1.999
Pattern Explanation
Matches valid IPv4 addresses (0-255 for each octet)
Alternative Patterns
1. ^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}$`
How to Use
1. The pattern above is preloaded—or enter your own 2. Add test strings to validate 3. See real-time match highlights 4. Copy the pattern for your code
Regex Quick Reference
| Symbol | Meaning | Example | ||
|---|---|---|---|---|
| \d | Any digit | \d{3} matches "123" | ||
| \w | Word character | \w+ matches "hello" | ||
| + | One or more | a+ matches "aaa" | ||
| * | Zero or more | a* matches "" or "aaa" | ||
| ? | Optional | colou?r matches "color" | ||
| ^ | Start of string | ^Hello | ||
| $ | End of string | world$ | ||
| [abc] | Character class | [aeiou] matches vowels | ||
| (a | b) | Alternation | (cat | dog) matches either |