◈ TOOLFORGE
TOOLFORGE/MOD_016/REGEX
DEVELOPERONLINE
WORD COUNTERFILE CONVERTPASS GENQR GENERATORJSON FORMATEMAIL REFINERINVOICE GENIP LOOKUP
SYS://MOD_016

REGEX PLAYGROUND

Live regular expression tester with match highlighting, group capture, flag toggles, and a library of common patterns. Runs entirely in your browser.

// PATTERN
//g
// TEST STRING6 MATCHES
// HIGHLIGHTED MATCHES
Hello world — test 123 foo bar baz.
// MATCH DETAILS
#1idx:1"ello"
#2idx:6"world"
#3idx:14"test"
#4idx:23"foo"
#5idx:27"bar"
#6idx:31"baz"
// COMMON PATTERNS
SYS://AD_SLOTSPONSORED
// AD_SLOT_AVAILABLE

Contact us to advertise here

// FAQ

FREQUENTLY ASKED QUESTIONS

Q1.What regex flavour does this use?

JavaScript (ECMAScript) regex — the same engine used in Node.js, browsers, and most JS frameworks. It supports all standard features including named capture groups, lookahead/lookbehind, and the s (dotAll) flag.

Q2.What do the flags do?

g (global) — find all matches, not just the first. i (ignore case) — match regardless of letter case. m (multiline) — ^ and $ match line boundaries, not just string start/end. s (dotAll) — dot (.) matches newlines too. u (unicode) — enables full Unicode support for \u{} escapes and Unicode property escapes.

Q3.How do I reference capture groups?

Wrap parts of your pattern in parentheses: (\d+). The Match Details panel shows each group's value as $1, $2, etc. For named groups, use (?<name>\d+).

Q4.Can I test multi-line strings?

Yes — just paste text with newlines into the test string area and enable the m flag if you want ^ and $ to match line boundaries.

Q5.What is the COPY JS button?

It copies your pattern as a JavaScript regex literal — e.g. /[a-z]+/gi — ready to paste directly into code.

← BACK TO ALL TOOLS