Regex Pal

Dan's Tools
Regular Expression
  • flags
Test String
Substitution
Expression Flags
ignore case (i)
global (g)
multiline (m)
extended (x)
extra (X)
single line (s)
unicode (u)
Ungreedy (U)
Anchored (A)
dup subpattern names(J)

Match or Validate phone number

Matches a string if it is a valid phone number. It can match dashes, periods, and spaces as delimiters, country code, and supports parentheses in the area code.

Comments

Top Regular Expressions

Cheat Sheet

Character classes
. any character except newline
\w \d \s word, digit, whitespace
\W \D \S not word, digit, whitespace
[abc] any of a, b, or c
[^abc] not a, b, or c
[a-g] character between a & g
Anchors
^abc$ start / end of the string
\b word boundary
Escaped characters
\. \* \\ escaped special characters
\t \n \r tab, linefeed, carriage return
\u00A9 unicode escaped ©
Groups & Lookaround
(abc) capture group
\1 backreference to group #1
(?:abc) non-capturing group
(?=abc) positive lookahead
(?!abc) negative lookahead
Quantifiers & Alternation
a* a+ a? 0 or more, 1 or more, 0 or 1
a{5} a{2,} exactly five, two or more
a{1,3} between one & three
a+? a{2,}? match as few as possible
ab|cd match ab or cd