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Regex Tester & Debugger
Test and debug regular expressions online. See matches highlighted in real-time with capture group details and match information.
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How to Use
- 1Paste or enter your input in the field above.
- 2Click the action button to process.
- 3Copy the result or download it.
Frequently Asked Questions
What are regular expressions?
Regular expressions (regex) are sequences of characters that define a search pattern. They are used for string matching, validation, and text manipulation.
What regex flags are supported?
Common flags include: g (global), i (case-insensitive), m (multiline), s (dotall), and u (unicode).
How do I capture groups?
Use parentheses () to create capture groups. Named groups use (?<name>pattern) syntax. The tool displays all captured groups for each match.
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