Generate Random Passwords
This post will teach you how to quickly generate a random password with Formula in Excel. You can combine a series of worksheet functions to create a complex formula to generate a random password in Microsoft Excel.
Generate Random Password
Normally, a secure password should have 8 characters at least and contain a mix of uppercase letters, lowercase letters, numbers and one specific character. To generate a Random and secure password in Excel, you can use a combination of the CHAR function, the RANDBETWEEN function and concatenation operator to build a new Excel formula. Just refer to the following formula.
=CHAR(RANDBETWEEN(65,90))&CHAR(RANDBETWEEN(97,122))&CHAR(RANDBETWEEN(97,122))&CHAR(RANDBETWEEN(65,90))&RANDBETWEEN(100,999)&CHAR(RANDBETWEEN(42,43))
Select one cell that you want to generate the random password, then enter this formula in that Cell, and press Enter key to apply this formula. You will see that it will generate an eight characters password.
If you want to generate a random password only contain alpha characters (random uppercase letter string), you can use the following formula:
=CHAR(RANDBETWEEN(65,90))
If you want only to generate a random lowercase letter string, you can use the below formula:
=CHAR(RANDBETWEEN(97,122))
If you want to generate a random password only contain 6digit numeric characters, you can use the following formula:
=RANDBETWEEN(100000,900000)
If you want to generate a random symbol string, just use the following formula:
=CHAR(RANDBETWEEN(33,47))
This formula will randomly generate one of the following specific characters: !”#$%&'()*+,./
We talked that the CHAR function will generate lots of specific characters, and if you just want to create a password that can be type on the keyboard, so you should keep the specific character simple and avoid to use characters like ¶, Œ, or ©.
Related Functions

Excel CHAR function
The Excel CHAR function returns the character specified by a number (ASCII Value).The CHAR function is a buildin function in Microsoft Excel and it is categorized as a Text Function. The syntax of the CHAR function is as below:=CHAR(number)…. 
Excel RANDBETWEEN Function
The Excel RANDBETWEEN function returns a random integer number that is between the numbers you specify.The syntax of the RANDBETWEEN function is as below:= RANDBETWEEN (bottom,top)….
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