Is There a Program to Change Hex Code to Assembly Code in X86? [Closed]

What you are looking for is called "Disassembler" that translates hex codes into assembly mnemonic. Provide more details on which platform (e.g. Windows, Unix etc.) and which processor architecture (e.g. x86, x64, ARM etc.) you want to do it for.

Here's what I found on Google. Pick one that suits your need. Good luck.

P.S.

Udis86 looks quite easy to use based on the demonstration on it's homepage.

$ echo "65 67 89 87 76 65 54 56 78 89 09 00 87" | udcli -32 -x 
0000000000000000 656789877665    mov [gs:bx+0x6576], eax
0000000000000000 54              push esp
0000000000000000 56              push esi
0000000000000000 7889            js 0x93 
0000000000000000 0900            or [eax], eax 

distorm also looks quite good.

In the Linux world:

objdump -dw mybinary

You can always use debug for this, as per the following transcript:

c:\pax> debug

-e 100 eb fe

-u 100 101
0B33:0100 EBFE          JMP     0100

-q

c:\pax> _

Of course, that's a fairly limiting option for any but the simplest of programs so you may want to get yourself a decent debugger such as OllyDebug.

Maybe for little pieces of hex, I use this online service