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decompyle3

Free#22 of 24 in Decompiler SoftwareReverse Engineering Tools

decompyle3: A focused, free choice for recovering Python source from tested 3.7–3.8 bytecode. Ranked #22 of 24 in Decompiler Software by our editors (6.4/10); pricing: Open source; best for python 3.7–3.8 bytecode recovery.

6.4/10Editor score
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decompyle36.4 Visit decompyle3

At a glance

  • Editor score
    6.4 / 10
  • Pricing
    Open source
  • Best for
    Python 3.7–3.8 bytecode recovery
  • Paid from
    Free
  • Native-code decompilation
    No
  • Facts checked
    20 Sep 2026
decompyle3 screenshot

  • Where it wins

    • Translates Python bytecode into equivalent Python source
    • Handles .pyc, .pyo, and bytecode fragments
    • Includes CLI tools, syntax verification, and disassembly

  • Where it doesn't

    • Verified bytecode support is limited to Python 3.7 and 3.8
    • Focused on Python bytecode rather than native-code decompilation
    • No platform or integration details are provided

Our verdict on decompyle3

decompyle3 is an open-source Python decompiler and bytecode library for developers who need to reconstruct source code from compiled Python files. It translates Python bytecode into equivalent Python source, reads .pyc and .pyo files, and supports fragment decompilation. The project is distributed under the GNU GPL-3.0-or-later license, making it a focused free option for Python bytecode recovery rather than a general-purpose native-code decompiler.

Its strongest fit is a workflow built around Python’s compiled artifacts and command-line processing. decompyle3 provides command-line decompilation tools, syntax verification for decompiled output, and bytecode disassembly capabilities. It can be installed with pip or from source, giving developers two stated installation paths. Fragment support is useful when the available input is not a complete compiled file, while syntax verification adds a direct check on whether the recovered output is syntactically valid.

The main decision point is bytecode coverage. The published project notes say Python 3.7 and 3.8 bytecode has been tested, and that newer Python versions can run the project without enabling decompilation of bytecode greater than 3.8. That makes decompyle3 a sensible choice for recovery work centered on those tested versions, especially when CLI access and disassembly matter. Choose another tool if the requirement is decompilation for later Python bytecode versions or native-code analysis.

Your product? Our editors can test decompyle3 in depth and publish a review, labelled as paid · from $149/mo →

decompyle3 pricing

Plans Open sourceFree Free to use — no paid tier required for the core job.
See plans on github.com

decompyle3 fact sheet

Free planNot verified
Paid fromFree
Native-code decompilationNo
Bytecode decompilationYes
Debugger integrationNot verified
Scripting APINot verified
Plugin supportNot verified
License typeFree
DeploymentSelf-hosted
SupportDocs
Built forSolo, Small business (editorial estimate)
PricingOpen source
Websitegithub.com
Facts checked20 Sep 2026

Alternatives to decompyle3

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Also Ranked In

decompyle3 is ranked in 2 of our directories.

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Featured on iTechGuides

Featured on iTechGuides — decompyle3 6.4/10

decompyle3 is listed in our Decompiler Software directory. Add the badge to your site — it links back to this page.

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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

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