Developer Utility
Regex Tester
Test regular expressions instantly, inspect matches and capture groups, and experiment with JavaScript regex flags.
Regular Expression
Enter your pattern and matching options
Test String
Enter text to test against your regex
Common Patterns
Click any pattern to load it
Match Results
No test performed yet
Match results will appear here
Enter a regex and test string, then click Test Regex.
0
Matches
0
Groups
0
Characters
g
Flags
Pattern Inspector
Current regular expression
No pattern loaded.
Regex Tips
Useful JavaScript regex basics
. matches any character
^ starts at the beginning
$ ends at the end
* matches zero or more
+ matches one or more
? makes a quantifier optional
^ starts at the beginning
$ ends at the end
* matches zero or more
+ matches one or more
? makes a quantifier optional
Live Matching
Test your pattern against custom text and inspect every match, position, and captured group.
JavaScript Flags
Experiment with global, case-insensitive, multiline, dotAll, Unicode, and sticky regex behavior.
Private & Browser-Based
Regex processing happens locally in your browser. Your test strings are not uploaded to a server.