Here are a bunch of online tools to help you for whatever reason, most will be text convertors or generators.
You may call these tools Techmofo Mini Tools if you wish ;-) (The Big Techmofo Tools are currently secret)

BASE X - Originally, this was meant to allow conversions on any base. Then I decided to stick to the ones people actually use: Dec (Decimal), Oct (Octodecimal/Octal), Bin (Binary) and of course the lovely Hex (Hexadecimal).

MD5 ENCRYPTER - Encrypt a string to it's MD5 equivalent.