uncompyle6
uncompyle6: A focused, open-source choice for recovering Python source across many bytecode generations. Ranked #20 of 24 in Decompiler Software by our editors (6.6/10); pricing: Free plan; best for legacy and multi-version Python bytecode.
At a glance
- Editor score6.6 / 10
- PricingFree plan
- Best forLegacy and multi-version Python bytecode
- Free planYes
- Paid fromFree
- Native-code decompilationNo
- Facts checked20 Sep 2026
Where it wins
- Supports Python bytecode from 1.4, 2.1–2.7, and 3.0–3.8
- Handles some PyPy versions and fragments around bytecode offsets
- Combines CLI decompilation, syntax verification, and disassembly
Where it doesn't
- Focuses on Python bytecode rather than native code
- Has no AI-assisted features
- GPL-3.0-or-later licensing may not fit every distribution model
Our verdict on uncompyle6
uncompyle6 is an open-source command-line tool and Python library that translates Python bytecode into equivalent Python source code. It is aimed at developers working with compiled Python files, reverse engineering, debugging workflows, and bytecode analysis. Its strongest fit is for teams handling legacy or multi-version Python artifacts, especially when the workflow needs both a local command-line interface and library access.
Its main distinction is breadth across Python bytecode generations. The published feature set covers Python 1.4, 2.1–2.7, and 3.0–3.8, along with some PyPy bytecode versions. uncompyle6 can also decompile fragments around a bytecode offset and provide associated offset details, which suits targeted investigation rather than only whole-file conversion. The separate bytecode-tokenization and disassembly command adds a lower-level inspection path, while the --syntax-verify option provides a direct way to check generated code syntax.
The product stays deliberately narrow: it is centered on Python bytecode and does not provide native-code decompilation. It is distributed under the GNU GPL-3.0-or-later license and is intended for local installation through Python packaging or project releases, so its fit depends on the surrounding Python workflow and distribution requirements. Choose uncompyle6 when cross-version Python coverage, fragment decompilation, command-line operation, and bytecode analysis matter most. Consider another category tool when the work involves native binaries or a broader platform and integration ecosystem.
Your product? Our editors can test uncompyle6 in depth and publish a review, labelled as paid · from $149/mo →
uncompyle6 pricing
uncompyle6 fact sheet
| Free plan | Yes |
|---|---|
| Paid from | Free |
| Native-code decompilation | No |
| Bytecode decompilation | Yes |
| Debugger integration | Not verified |
| Scripting API | Yes |
| Plugin support | Not verified |
| License type | Free |
| Deployment | Self-hosted |
| Support | Community, Docs |
| Built for | Solo, Small business (editorial estimate) |
| Pricing | Free plan |
| Website | github.com |
| Facts checked | 20 Sep 2026 |
Alternatives to uncompyle6
- GhidraA free, broad toolkit for native-code, Java, and DEX analysis.9.4
- Binary NinjaA broad native reverse-engineering toolkit with perpetual paid licenses and a free plan.9.2
- IDA ProA deep native reverse-engineering suite for teams that need broad architecture support.9.0
See all uncompyle6 alternatives →
Also Ranked In
uncompyle6 is ranked in 2 of our directories.
Used uncompyle6? Be the first to review it
The editor score above is our own research. What this page doesn't have yet is a reader's view — what you used uncompyle6 for, what worked and what didn't. No stars are seeded and no review is paid for; an editor reads every one before it appears.
Write a reviewTwo minutes · verified accounts only · read by an editor before it appears
Featured on iTechGuides
uncompyle6 is listed in our Decompiler Software directory. Add the badge to your site — it links back to this page.
<a href="https://www.itechguides.com/products/uncompyle6/"><img src="https://www.itechguides.com/best/badge/uncompyle6.svg" alt="Featured on iTechGuides" width="230" height="46"></a>
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.
Last updated · How we research and update