Regex Tester
Test regular expressions with real-time match highlighting, replacement, templates, and history.
Regex Templates
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Last Result
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Matches
0
Unique
0
Groups
0
Regex Explanation
Regex pattern breakdown and matching behavior.
- Uses '.' wildcard to match any character.
- Uses character classes ([...]).
- Uses quantifiers (+, *, ?, {m,n}).
- Case-insensitive matching (i).
- Global matching (g).
Risk Scanner
Score 0No major backtracking risks detected.
Suggested Test Cases
Generate tests to see sample inputs.
About This Tool
Build and debug regex patterns with live highlights, captured groups, and quick replacement testing.