RegEx Tester
Test a regular expression against sample text with live match highlighting.
Runs in your browser — nothing is sent to a server
//g
Contact: ada@example.com or grace@dev.io
Site https://quembo.org
Released 2026-09-04 from 192.168.1.20
2 matches
About this tool
Write a JavaScript regular expression and see every match highlighted in your sample text as you type. Toggle the g, i and m flags, inspect captured groups for each match, and start from a few common patterns (email, URL, date, IP). Everything evaluates locally in your browser.