Steve Gibson writes great software. This tool will generate random passwords for you you, this is usefull for alot of things such as WPA and WEP.
https://www.grc.com/passwords
It gives you 3 choices!
63 random alpha-numeric characters (a-z, A-Z, 0-9)
63 random printable ASCII characters
64 random hexadecimal characters (0-9 and A-F):