Faq : Encode Ascii character to Hexadecimal(Base 16 : code that uses 16 characters) or decode Hexadecimal content to Ascii String
Base16 alphabet : abcdef0123456789
Hexadecimal encode : will convert each ascii characters like a,b,c,d....1,2,3...%*+-.... one by one to hexadecimal content. Hexadecimal decode : will convert the hexadecimal content already encoded to ascii string... For more info about ascii characters you could see the ascii table.