Regex Tester - Regular Expression Tester
Test and debug regular expressions in real-time with visual result highlighting. Supports JavaScript regex patterns with multiple flags including global, case-insensitive, multiline, and Unicode modes.
Test Text
❌
{{ matchError }}
Match Results
Matches
{{ matchResults.length }}
Flags
{{ activeFlagsString || '-' }}
Full Pattern
/{{ regexPattern }}/{{ activeFlagsString }}
匹配 #{{ index + 1 }}
{{ match.fullMatch }}
Group {{ gIndex + 1 }}:
{{ group || '(empty)' }}
{{ name }}:
{{ value || '(empty)' }}
position:
{{ match.index }}
length:
{{ match.length }}
ℹ️
No matches found
Highlighted Text
InputRegex Expression和文本，然后点击"测试正则"查看结果
Regex Diagram
{{ token.value }}
模式将在此可视化...
{{ toastMessage }}
Regex Expression
What is a Regular Expression Tester?
A regular expression tester is an essential tool for developers, data analysts, and anyone working with text pattern matching. Our regex tester allows you to:
- Test and validate regex patterns in real-time
- Visualize matches with highlighted text output
- Debug complex patterns with detailed match information
- Support multiple regex flags (global, case-insensitive, multiline, Unicode)
- Extract groups and named captures from your patterns
Perfect for JavaScript developers, Python programmers, and anyone needing to match text patterns. No installation required - works directly in your browser.