Developer Tool100% Client-Side
Regex Tester & Debugger
Test regular expressions with real-time match highlighting, capture groups, flags (g, i, m, s), and common regex cheatsheet templates.
Presets:
//
Client-side RegExp Engine
No regex matches found in test string.
How to Use Regex Tester & Debugger
1
Enter Regex Pattern
Type your regular expression pattern and toggle flags (Global, Case-insensitive, Multiline).
2
Input Test String
Paste the text you want to evaluate.
3
Inspect Matches
Review highlighted matches, index positions, and extracted capture groups.
Frequently Asked Questions
Are common regex patterns provided?
Yes! Presets for Email, URL, IP Address, Phone, and Dates are accessible with one click.
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