Regex Tester

Test, debug, and learn regular expressions with real-time highlighting and 150+ curated examples

//g

Test String

Matches: 0

About this tool

Matches update instantly as you type. Highlights, capture groups, and index positions update live.

Curated library of real-world regex patterns with a searchable modal and one-click loading.

Every example includes a detailed explanation of how the pattern works, helping you learn regex concepts step by step.

Built with:

React

TypeScript

RegExp API