Regex Tester

Test regular expressions against sample text in real time with match highlighting.

Pattern & Text Ready

Regular expression

/ /

Test text

Replacement text ($1, $2 reference capture groups)

Live match

Matches 0 matches

Matches are highlighted here as you type. Capture groups are shown per match below.

Match details

#	Matched text	Pos	Len	Groups

Regex cheatsheet

Anchors ^ start $ end \b word boundary

Character classes \d digit \w word \s whitespace [a-z] range [^abc] negated

Quantifiers * 0+ + 1+ ? 0-1 {n,m} n to m

Groups & escapes (exp) capture (?:exp) non-capture \. literal dot \\ backslash

Tool Introduction

Write a regular expression, watch matches highlight in your text as you type, and inspect every capture group in the details table. Test, replace with $1-style backreferences, and copy matches as plain text or TSV for spreadsheets.

Flag buttons cover the common switches (i, g, m, s, u, y), and the presets drop in ready-made patterns for email, URLs, phone numbers and more.