Development Tool
Live Updates
Regex
Tester
Test regular expressions dynamically against any text. Matches are highlighted instantly as you type. All processing runs entirely in your browser — private and secure.
// Total Uses
6
and counting
// Engine
JS
ECMAScript RegExp
regex-tester.js
LIVE
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§ Specs
Quick Reference
Common Flags
g - Global match (find all matches rather than stopping after the first
match)i - Ignore case (case-insensitive matching)m - Multiline (^ and $ match start/end of line)
Security & Processing
This tool uses the JavaScript RegExp engine running locally in your
browser. All inputs, patterns, and texts stay strictly on your device.