With this UDF, you can convert a decimal number to any base (binary, oct, hex, base32, base64) and you can even create your own base. #include <Array.au3> $base64 = "A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R,S,T,U,V,W,X,Y,Z,a,b,c,d,e,f,g,h,i,"& _ "j,k,l,m,n,o,p,q,r,s,t,u,v,w,x,y,z,0,1,2,3,4,5,6,7,8,9,+,/" $base32 = "A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R,S,T,U,V,W,X,Y,Z,2,3,4,5,6,7" $base16 = "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F" $base8 = "0,1,2,3,4,5,6,7" $base2 = "0,1" $number = InputBox