Developer

REGEX TESTER

Test JavaScript regular expression patterns against test strings with live match indexing and capture groups.

Regular Expression & Flags

Found 2 regex match(es) in test string.

Test String Input

Matches & Capture Groups

Match #1Index: 14

support@nemon.tools

Group $1: "support"

Group $2: "nemon.tools"

Match #2Index: 37

sales@example.com

Group $1: "sales"

Group $2: "example.com"

HOW TO USE REGEX

Enter regex pattern string and flags (e.g. g, i, m).

Paste test string input into the left editor.

Inspect matching substrings, indices, and parenthesis capture groups.

Evaluates pattern matching natively using ECMAScript V8 RegExp engine.

Generate common regex patterns.

Search and replace text strings.