JAVASCRIPT

password regex

Minimum eight characters, at least one letter and one number:
"^(?=.*[A-Za-z])(?=.*d)[A-Za-zd]{8,}$"

Minimum eight characters, at least one letter, one number and one special character:
"^(?=.*[A-Za-z])(?=.*d)(?=.*[@$!%*#?&])[A-Za-zd@$!%*#?&]{8,}$"

Minimum eight characters, at least one uppercase letter, one lowercase letter and one number:
"^(?=.*[a-z])(?=.*[A-Z])(?=.*d)[a-zA-Zd]{8,}$"

Minimum eight characters, at least one uppercase letter, one lowercase letter, one number and one special character:
"^(?=.*[a-z])(?=.*[A-Z])(?=.*d)(?=.*[@$!%*?&])[A-Za-zd@$!%*?&]{8,}$"

Minimum eight and maximum 10 characters, at least one uppercase letter, one lowercase letter, one number and one special character:
"^(?=.*[a-z])(?=.*[A-Z])(?=.*d)(?=.*[@$!%*?&])[A-Za-zd@$!%*?&]{8,10}$"

RegExp validation for password explained

r'^
  (?=.*[A-Z])       // should contain at least one upper case
  (?=.*[a-z])       // should contain at least one lower case
  (?=.*?[0-9])      // should contain at least one digit
  (?=.*?[!@#$&*~]) // should contain at least one Special character
  .{8,}             // Must be at least 8 characters in length  
$

password regex

^(?=.*?[A-Z])(?=.*?[a-z])(?=.*?[0-9])(?=.*?[#?!@$%^&*-]).{8,}$

regex password

^(?=.*[a-z])(?=.*[A-Z])(?=.*[0-9])(?=.*[!@#$%^&*])(?=.{8,})

regrex for password

"^(?=.*[a-z])(?=.*[A-Z])(?=.*d)(?=.*[@$!%*?&])[A-Za-zd@$!%*?&]{8,10}$"

password regex

"^(?=.*[A-Za-z])(?=.*d)(?=.*[@$!%*#?&])[A-Za-zd@$!%*#?&]{8,}$"

password regex

^                 # start-of-string
(?=.*[0-9])       # a digit must occur at least once
(?=.*[a-z])       # a lower case letter must occur at least once
(?=.*[A-Z])       # an upper case letter must occur at least once
(?=.*[@#$%^&+=])  # a special character must occur at least once
(?=S+$)          # no whitespace allowed in the entire string
.{8,}             # anything, at least eight places though
$                 # end-of-string

regex pattern for strong password

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

regex pattern for password validation

// Match at least one uppercase letter, 
// at least one lowercase letter, 
// at least one digit 
// and includes 12 or more symbols
String validPassRegex = "^(?=.*[0-9])(?=.*[a-z])(?=.*[A-Z])(?=S+$).{12,}$";

// and special characters:
String validPassRegex2 = "^(?=.*[0-9])(?=.*[a-z])(?=.*[A-Z])(?=.*[@#$%^&+=])(?=S+$).{8,}$";

regex password

r'^
  (?=.*[A-Z])       // should contain at least one upper case
  (?=.*[a-z])       // should contain at least one lower case
  (?=.*?[0-9])      // should contain at least one digit
  (?=.*?[!@#$&*~]) // should contain at least one Special character
  .{8,}             // Must be at least 8 characters in length  
$

password validation Regex

Minimum eight characters, at least one letter and one number: "^(?=.*[A-Za-z])(?=.*d)[A-Za-zd]{8,}$"

password regex

new RegExp('^[a-zA-Z0-9]{3,30}$')