Regular Expression (RegEx) Real-Time Tester
Test patterns, flags (g, i, m, s), capture groups, and match highlighting.
Regex (Regular Expression) Tester
Real-time regular expression pattern evaluator with match counter, highlights, and capture groups.
About the Regular Expression (RegEx) Tester
Tests JavaScript-compatible regular expressions against sample text in real time, highlighting matching substrings and extracting capture groups.
How to Use
Enter your regex pattern and flags (e.g. /^[a-z0-9_.-]+@[a-z0-9.-]+$/i), then type or paste sample text to see matches immediately.
Understanding Results
Visualizes match count, capture group values, and validation errors.
Frequently Asked Questions
Which regex flavor is used?
It uses ECMAScript / JavaScript regular expression syntax native to modern web browsers.
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