Regex Tester
Test JavaScript regular expressions in real time, inspect capture groups, and explain any pattern token-by-token.
Runs in your browser Live highlighting Token explainer
//gi
Contact us at hello@netius.com or sales@netius.com
#1 at index 14: hello@netius.com
#2 at index 34: sales@netius.com
What it does
Live test
Edit your pattern or test string and watch matches highlight instantly.
Explain a pattern
Paste any regex and get a token-by-token breakdown with plain-English explanations.
Every flag
Toggle g, i, m, s, u flags and inspect every match index and capture group.
Frequently Asked Questions
Quick answers about the regex tester.
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