Regex Tester

Advanced Regex Tester

Create, test, and debug regular expressions with powerful tools

Pattern

Flags

gGlobal - find all matches

iIgnore case - case insensitive

mMultiline - ^ and $ match line breaks

uUnicode - treat pattern as unicode

ySticky - match from lastIndex only

sDot all - . matches newline chars

No matches found

Test String

Sample Text

Pattern Library

^[\w\.-]+@[\w\.-]+\.[a-zA-Z]{2,}$

Matches valid email addresses

URL

https?:\/\/(www\.)?[-a-zA-Z0-9@:%._\+~#=]{1,256}\.[a-zA-Z0-9()]{1,6}\b([-a-zA-Z0-9()@:%_\+.~#?&//=]*)

Matches HTTP/HTTPS URLs

Phone (US)

^(\+?1-?)?$?([0-9]{3})$?[-. ]?([0-9]{3})[-. ]?([0-9]{4})$

Matches US phone numbers

Credit Card

^(?:4[0-9]{12}(?:[0-9]{3})?|5[1-5][0-9]{14}|3[47][0-9]{13}|3[0-9]{13}|6(?:011|5[0-9]{2})[0-9]{12})$

Major credit card formats

IPv4

^(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$

IPv4 addresses

Date (MM/DD/YYYY)

^(0[1-9]|1[0-2])\/(0[1-9]|[12][0-9]|3[01])\/(19|20)\d\d$

US date format

Hex Color

^#([A-Fa-f0-9]{6}|[A-Fa-f0-9]{3})$

Hexadecimal color codes

Password Strong

^(?=.*[a-z])(?=.*[A-Z])(?=.*\d)(?=.*[@$!%*?&])[A-Za-z\d@$!%*?&]{8,}$

Strong password requirements

Username

^[a-zA-Z0-9_-]{3,16}$

Alphanumeric username 3-16 chars

HTML Tag

<\/?[\w\s="/.':-]+\/?>

HTML tags with attributes

JSON String

"([^"\\]|\\.)*"

JSON string values

CSS Class

\.[a-zA-Z]([a-zA-Z0-9_-]+)?

CSS class selectors