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Posted 12 Jan 2016


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How to Identify if the Executable is 32-bit or 64-bit

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12 Jan 2016CPOL1 min read
How to identify if the executable is 32-bit or 64-bit


Most of the time, we face a problem to identify whether the application or executable is compatible to 32 or 64-bit version.

Basically, there are two approaches:

  1. dumpbin.exe provided with Microsoft’s Visual Studio
  2. Any hex editor


First Approach

Mandatorily requires, previously installed Microsoft’s Visual Studio.

Start Visual Studio command prompt (recommend Privileged Mode)

Go to:

Home > All Programs > Microsoft Visual Studio (any version probably >= 2008) > Visual Studio Tools > Visual Studio Command Prompt

Then, “Run as administrator“.

Copy dumpbin.exe into the folder where the application (EXE) is located and then run the following command:

>dumpbin.exe /headers <executable/exe/bin> | findstr "magic machine"

In case of 32bit:             machine (x86)

In case of 64bit:             machine (x64)

Second Approach

Mandatorily, any hex editor (works with notepad++.).

Note: Online hex editors can also be used.

Open the application or an EXE file with an hex editor (in my case notepad++) and locate “PE..” (Ideally found in first 256 chunk of data).

In case of 32bit:             PE..L.. (hex code: 504500004Cxxxx) = 32 bit

In case of 64bit:             PE..d.. (hex code: 504500006486xx) = 64 bit

Using the Code


D:\Software\eclipse-jee-luna-R-win32-x86_64\eclipse>dumpbin.exe /headers eclipse.exe | 
	findstr "magic machine"

            8664 machine (x64)

             20B magic # (PE32+)

D:\Software>dumpbin.exe /headers jxpiinstall.exe | findstr "magic machine"

             14C machine (x86)

                   32 bit word machine

             10B magic # (PE32)



PE..L.. (hex code: 504500004Cxxxx) = 32 bit



PE..d.. (hex code: 504500006486xx) = 64 bit

Points of Interest

Hex editor links:


This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)


About the Author

Amit KD
United States United States
No Biography provided

Comments and Discussions

QuestionIn Win8+ you can also see it in Task Manager if the app is running. Pin
lviolette16-Feb-16 8:10
Memberlviolette16-Feb-16 8:10 
QuestionIn linux simple know by using a command Pin
sai manikanta24-Jan-16 5:45
professionalsai manikanta24-Jan-16 5:45 
AnswerIs your app 64-bit Pin
fcav21-Jan-16 7:05
Memberfcav21-Jan-16 7:05 
QuestionIs your app 64-bit? Pin
geoyar13-Jan-16 11:03
professionalgeoyar13-Jan-16 11:03 
AnswerRe: Is your app 64-bit? Pin
Amit KD15-Jan-16 0:06
MemberAmit KD15-Jan-16 0:06 
AnswerRe: Is your app 64-bit? Pin
dandy7218-Jan-16 5:57
Memberdandy7218-Jan-16 5:57 

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