Regular Expression Tester
Test and Debug Regular Expressions
Test, validate, and debug regular expressions with real-time matching
Regex Options
How It Works
1. Enter Pattern
Start by entering your regular expression pattern. The pattern will be automatically wrapped with forward slashes and any flags you've selected.
2. Configure Options
Select the appropriate regex flags for your needs. Each flag modifies how the pattern matches text in different ways.
3. Test and Review
Enter your test text and click "Test" to see all matches. Each match shows its text, position, and any captured groups.
Frequently Asked Questions
What are regex flags?
Regex flags modify how the pattern matches text. Common flags include 'g' for global matching, 'i' for case-insensitive matching, and 'm' for multiline mode.
What are capturing groups?
Capturing groups are portions of a pattern enclosed in parentheses that "capture" the matched text for later use. They're useful for extracting specific parts of a match.
Is my data secure?
Yes! All regex testing is performed locally in your browser. Your patterns and test text never leave your device or get sent to any servers.
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