Free Disassemblers, Hex Editors & Viewers

Disassemble, decompile, view, edit binary code, object files, executables, disk sectors

Free Disassemblers, Decompilers, Hex Editors & Hex Viewers

Ever encountered a situation where you needed to view, disassemble or decompile a binary file, such as a data file, an object file, a library archive, a shared library (or DLL in Windows) or an executable image? Assembled on this page are several hex viewers (hexadecimal viewers), hex editors, disassemblers and decompilers that will allow you to do precisely that.

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Free Disassemblers, Decompilers and Binary Viewers

RetDec New

RetDec is a decompiler that supports Intel x86, ARM, MIPS, PIC32 and PowerPC executables using formats such as ELF, PE, Mach-O, COFF, AR, Intel HEX and raw machine code. It detects compilers and packers used on the executables, can remove statically-linked library code, extract and use embedded debugging information (DWARF and PDB), reconstruct instruction idioms and C++ class hierarchies (RTTI, vtables), demangle C++ symbols, reconstruct functions and other high level constructs, etc. It has an integrated disassembler, and can output files in C and a Python-like language. It is also able to generate call graphs, control-flow graphs and a variety of statistics. This is a Windows and Linux program. You can also build it on Mac OS, although that platform is not officially supported. The software is open source; RetDec itself is released under the MIT licence, but it also includes other third-party libraries and resources, released under a variety of other licences.

HxD Freeware Hex Editor

HxD is a hex editor that not only allows you to view and edit files but also allows you to perform raw disk editing as well as edit the RAM of other processes. You can search and replace, export, insert byte patterns, shred files, concatenate files, split them, etc. The search and replace facility supports Unicode, ANSI text and hex values.


Debuggy is a Windows debugger, disassembler, Windows resource extractor, file hex editor, window sniffer and API spy all rolled into one.

Boomerang Decompiler

Boomerang is an open source decompiler that produces a high level, compilable C source file from an x86 executable file. Supported executable formats include Windows PE, Linux, SPARC, Power PC (Linux, Mac OS X).


This is a binary (hex) file editor for Windows. The program is released under the GNU GPL.

REC Reverse Engineering Compiler

REC is a decompiler for reverse engineering 386, 68k, PowerPC and MIPS R3000 binaries, including ELF format binaries (Linux, System V Rel 4, Solaris, etc), COFF (System V Rel 3), PE (Win32 EXE and DLL), a.out (BSD systems, SunOS 4), Playstation PS-X (MIPS only), and raw binary data. It produces a "C-like representation" of the program's code and data. It is able to handle symbolic information in various binary formats (ELF+STAB, COFF, a.out+STAB). REC is available for Windows, Linux, Solaris SPARC, Solaris i386, and SunOS.

Frhed Binary Editor

A Win32 binary editor that also allows you to compare files, manipulate bits, use big-endian or small-endian, apply binary templates for structured information, etc. The C++ source code is provided.

Beye (formerly Biew) Binary Viewer

This is a multiplatform binary viewer with "a built-in editor for binary, hexadecimal and disassembler modes". It supports disassembly of Pentium III, AMD K7 Athlon, and Cyrix M2 as well, and the ability to handle the following executable formats: MZ, NE, PE, LE, LX, DOS, SYS, NLM, arch, ELF, a.out, coff32, PharLap, and rdoff.

Borg Disassembler

Borg is a non-interactive disassembler that handles Win32 executables and shared libraries (DLLs), writing the disassembled listing to a file.

Sang Cho's Win32 Program Disassembler

This is a command line utility that disassembles Win32 PE executables (EXEs) and shared libraries (DLLs). It comes with source code which may be compiled and used on both Windows and Linux.

Khexedit Hex Editor

[Update: this site is no longer available.] This is a hex editor (binary editor) for use on X Window systems. According to the author's documentation, it is designed to be integrated with the KDE environment but can be used without it, as long as the KDE libraries are installed on the computer.

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