Generate passwords with JavaScript
The function generatePassword() is a simple yet customizable function that generates a random password string, the default password length is 6, you can override it by calling the function like this generatePassword(n) where n is the password length. The possible characters are defined within the function with the variable chars
The function: generatePassword([len=6])
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 | function generatePassword(len){ len = parseInt(len); if(!len) len = 6; var password = ""; var chars = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"; var charsN = chars.length; var nextChar; for(i=0; i<len; i++){ nextChar = chars.charAt(Math.floor(Math.random()*charsN)); password += nextChar; } return password; } |
Usage
The first example show the function without the optional len patamater(string length), and second example makes use of it:
1 2 3 4 5 6 | // Example 1: No len window.alert("A random string of 6 characters: " + generatePassword()); // Example 2: Using len pwdLen = 10; window.alert("A random string of " + pwdLen + "characters: " + generatePassword(pwdLen)); |
Try it
Generate a random password of 128 characters.