Boomerang

Boomerang is a free, BSD-licensed decompiler for selected native machine-code binaries. It best serves developers and experimenters comfortable compiling technical software and interpreting imperfect C output. Choose it when its narrow architecture and format coverage fit your target; look elsewhere for bytecode or faithful source recovery.

Overview

Boomerang translates machine code into C to aid inspection of compiled programs. The generated C is a reconstruction, not the original source file, and can differ substantially in structure and meaning. The maker also cautions that large-binary decompilation may disappoint, so Boomerang is better suited to focused analysis, research, and experimentation than to rebuilding an entire application from a binary.

Key features

Native-code output: The tool produces C from supported native binaries. It has no bytecode decompilation capability, excluding managed-code investigations that depend on bytecode-level analysis.

Defined architecture set: Targets include x86 in IA-32 form, PPC, and ST20. That can be useful for legacy or embedded work, but IA-32-only x86 support excludes x86-64 binaries.

Executable formats: Boomerang accepts ELF, PE, DOS MZ, DOS/4GW LE, and Mach-O files. These formats cover several Unix, Windows, DOS, and macOS scenarios, while targets outside this set need another tool or a conversion step.

Command line and GUI: A CLI supports scripted or developer-oriented workflows, while a graphical application offers an interactive alternative. Neither interface expands the supported architectures, formats, or quality limits.

Open development stack: The project provides unit and regression tests and directs bug reports to GitHub issues. Windows users should note that building the regression-test suite is not supported.

Pricing

Boomerang Decompiler costs nothing, with an open-source BSD license. There are no paid tiers, seat charges, usage quotas, or trial period to weigh: the same free project is the offering. That makes it a practical first option for individual developers, students, researchers, and teams able to handle their own build and support work. The trade-off is that there is no commercial plan promising broader architecture coverage or a different output model.

Platforms

Build instructions cover Linux, macOS, and Windows, and the project is presented for all three platforms. Compilation requires a 64-bit operating system and a C++17 compiler; 32-bit systems are unsupported. CMake, Qt5, Capstone, GNU bison, and GNU flex are documented prerequisites, with CCache, Doxygen, and Python 3 listed as optional tools. Release versions have precompiled packages, but the project recommends building the development branch from source, which favors technically equipped users over people seeking a turnkey installer.

Who it's for

Use Boomerang when you need zero-cost, source-available analysis of IA-32, PPC, or ST20 binaries in one of its supported formats and can judge reconstructed C critically. It is also a reasonable fit for experimenters exploring decompilation internals. It is a poor match for x86-64 targets, bytecode, large programs where completeness matters, or projects that require the recovered code to mirror the original implementation.

Pros and cons

Pros

No purchase barrier: The BSD-licensed project is free to use and inspect.

Useful workflow choice: CLI and GUI interfaces accommodate both automation and interactive investigation.

Cross-platform build guidance: Linux, macOS, and Windows are covered, subject to the 64-bit and dependency requirements.

Several legacy formats: ELF, PE, DOS variants, and Mach-O give it reach across varied native-binary workloads.

Cons

Narrow architecture coverage: IA-32, PPC, and ST20 leave modern x86-64 work outside its scope.

Approximate output: C does not recreate the original source, limiting direct reuse.

Build burden: A 64-bit C++17 environment plus multiple dependencies is required; Windows regression tests cannot be built.

Scale caution: Large binaries may produce disappointing results.

Alternatives

JEB is the better choice when you want a freemium product with a free Community Edition for x86 and x86-64 decompilation, plus API and broader platform options.

Binary Ninja fits readers who need multiple decompilation architectures and are willing to move from its limited free evaluation to a perpetual Personal plan.

rev.ng suits users seeking a free-software decompilation pipeline with commercial cloud and standalone UI options.

IDA Pro is the alternative for a paid, established analysis product whose free edition covers x86-32 and x86-64 disassembly with cloud decompilers.

Redgate SQL Provision is a separate paid provisioning product for masking and provisioning production database volumes.

RetDec is another free, open-source decompiler under the MIT license.

uncompyle6 is the relevant pick for Python bytecode decompilation rather than native machine code.

Bytecode Viewer is a free GPLv3 open-source option for bytecode-oriented work.

Browse Decompiler Software and Reverse Engineering Tools for broader comparisons.

Verdict

Boomerang is a sensible free choice for technically capable users examining IA-32, PPC, or ST20 binaries who accept reconstructed C as analytical material. Its BSD license, cross-platform build guidance, and dual interfaces are compelling at zero cost. Look elsewhere when your target is x86-64 or bytecode, when you need polished commercial support, or when large-binary results must approach the original source.