Regex Tester
Test regular expressions with live matching and highlighting.
What does Regex Tester do?
Regex Tester lets you test regular expressions against sample text with instant match results, capture groups, and execution time.
Use Cases
- •Test regex patterns before using them in code
- •Debug complex regular expressions
- •Learn regex by experimenting with patterns
- •Validate input patterns (emails, phones, etc.)
How to Use
- 1Enter your regex pattern in the pattern field
- 2Toggle flags (global, case-insensitive, multiline)
- 3Enter test text in the input area
- 4Click "Test" to see all matches
Frequently Asked Questions
What are regex flags?
Flags modify regex behavior: g (global - find all matches), i (case-insensitive), m (multiline), s (dotAll), u (unicode).
What are capture groups?
Capture groups are parts of the pattern enclosed in parentheses () that capture specific parts of the match.
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