🔍 Regex Online Tester & Explainer
Test regular expressions online with real-time match highlighting, capturing group extraction, pattern breakdown, and quick preset cheat sheets. 100% client-side.
Presets:
✏️ Test Text Input
✨ Match Results0 Matches
📦 Capturing Groups Breakdown
❓ Frequently Asked Questions
How does the live Regex matching engine work?
The tool evaluates your pattern against the test text in real-time using JavaScript's native RegExp object with error boundary safety.
What flags are supported by this Regex tester?
It supports standard Javascript RegExp flags including g (global), i (case insensitive), m (multiline), and s (dotAll).
Is my regular expression or test data sent anywhere?
No. All regular expression parsing, matching, syntax testing, and group extraction run 100% locally in your web browser.
