Regex Tester

Test and debug regular expressions with real-time match highlighting using our free online regex tester. Essential for developers writing pattern matching code, data validators, or text processing scripts. See matches highlighted instantly as you type, with detailed match information including captured groups. All testing happens in your browser for privacy.

사용 방법

Enter your regex pattern and select flags.
Paste test text to match against.
See highlighted matches and captured groups in real-time.

주요 기능

Real-time match highlighting
Support for regex flags (g, i, m, etc.)
Shows captured groups
Browser-based secure testing

자주 묻는 질문

What regex flavor is used?

JavaScript regex is used, which is compatible with most programming languages with minor syntax differences.

What do the flags mean?

Common flags: 'g' for global (all matches), 'i' for case-insensitive, 'm' for multiline mode.

Can I test replacement patterns?

This tool focuses on pattern matching. For find-replace with regex, use dedicated tools.