Regex Tester
Test regular expressions with live highlighting
//
100% client-side. Your data never leaves your browser.
About this tool
Test regular expressions against sample text with live match highlighting. Supports all JavaScript regex features. Perfect for debugging patterns before using them in code.
Frequently Asked Questions
What regex flavor does this use?
This uses JavaScript regular expressions. Most common patterns work across languages, but some advanced features may differ.
Are my regex patterns saved?
No, everything is processed in your browser. Nothing is saved or transmitted.