Random string generator is a tool which could help you generate a random string based on your chosen characters. By default it generates a 16 character string length.
The output contains characters from the allowed characters field, which by default uses all 26 upper and lower case letters a-z and A-Z and numbers 0-9 (alpha-numeric string). You can specify the allowed character set in more input options and also how many strings you would like to generate by the field number of strings, where the default value is 1.
Although this tool has no pattern for random generation, if you look for a random secure string, use the secure string generator listed in the related tools below.