Regex Tester

Test regular expressions live. Matches highlighted inline, capture groups listed, replace mode built in. JavaScript engine.

Pattern

g i m s

/ /gi

Test String

📝

Live Matching

Every keystroke instantly re-runs the regex and highlights matches in the test string.

🎯

Capture Groups

Named and numbered groups are listed with their values for each match.

🔄

Replace Mode

Test replacements with $1, $2 capture group references before using in code.

⚡

JS Engine

Uses the native browser JavaScript regex engine — same behaviour as your Node.js or browser code.