zipfile-deflate64
Extract Deflate64 ZIP archives with Python's zipfile API.
Decision gist · record as of 2026-08-14
Yes, if you need to extract Deflate64 ZIP files in Python and have no other decompression tool available. The package is straightforward to use and has no runtime dependencies. However, note that it is dormant (last release January 2022) and may not receive updates for future Python versions; verify compatibility with your target Python version before relying on it in production.AI-flagged interpretation of the facts on this page — verify before relying
Before you install
- Requires Python 3.6 or later; the package monkey-patches the standard zipfile module on import, so it must be imported before zipfile operations.
- Medium install friction due to compiled wheels; the package is dormant (last release January 2022, no commits since December 2023) but has prebuilt wheels for Python 3.6–3.10 on macOS, Linux, and Windows, reducing runtime compilation risk.
License · maintenance · safety
Apache 2.0 (permissive) — Apache 2.0 is permissive; you may use, modify, and distribute this package freely in commercial and private projects with minimal restrictions.
last release 2022-01-05 (1682 days) · last repo commit 2023-12-05 · 22 stars
0 known vulnerabilities (OSV.dev, 2026-08-14) · 1,119,071 downloads/mo, #4,342 on PyPI
Alternatives
Verify before relying
pip install zipfile-deflate64
import zipfile_deflate64
# Now standard zipfile.ZipFile() can extract Deflate64 archives
import zipfile
with zipfile.ZipFile('archive.zip') as z:
z.extractall()- Whether the package works correctly with Python versions beyond 3.10 (fact sheet lists support only through 3.10).
- Current maintenance status and likelihood of updates for newer Python releases or security issues.
- Performance characteristics when extracting very large Deflate64 archives.
What it is and what it does
zipfile-deflate64 solves a specific compatibility problem: recent versions of Windows Explorer use Deflate64 compression for ZIP files larger than 2GB, but Python's standard zipfile module does not support this format. The package wraps the infback9 Deflate64 decompression library (from zlib) and monkey-patches Python's zipfile module to recognize and decompress Deflate64-compressed entries transparently.
When imported, the package modifies the standard zipfile module in-place, so any subsequent calls to zipfile.ZipFile() automatically gain Deflate64 support. It re-exports the entire zipfile API for convenience, allowing you to use it as a drop-in replacement. The package has no runtime dependencies and is distributed as precompiled wheels for common platforms and Python versions.
Use it for
- Extract large ZIP files created by Windows Explorer's native compression feature without external tools.
- Process ZIP archives from Windows systems in a Python application that previously failed on Deflate64 entries.
- Automate handling of mixed-compression ZIP files where some entries use standard Deflate and others use Deflate64.
- Replace manual workarounds (e.g., calling 7-Zip or p7zip CLI tools) with a native Python solution.
Worth the install?
AI-flagged interpretation of the facts on this page. Verify before relying on it.
Yes, if you need to extract Deflate64 ZIP files in Python and have no other decompression tool available.
The package is straightforward to use and has no runtime dependencies. However, note that it is dormant (last release January 2022) and may not receive updates for future Python versions; verify compatibility with your target Python version before relying on it in production.
Install
zipfile-deflate64 on PyPI
Before you install
Medium install friction due to compiled wheels; the package is dormant (last release January 2022, no commits since December 2023) but has prebuilt wheels for Python 3.6–3.10 on macOS, Linux, and Windows, reducing runtime compilation risk.
Requires Python 3.6 or later; the package monkey-patches the standard zipfile module on import, so it must be imported before zipfile operations.
License in practice
Apache 2.0 is permissive; you may use, modify, and distribute this package freely in commercial and private projects with minimal restrictions.
Quickstart
pip install zipfile-deflate64
import zipfile_deflate64
# Now standard zipfile.ZipFile() can extract Deflate64 archives
import zipfile
with zipfile.ZipFile('archive.zip') as z:
z.extractall()Verify before relying
- Whether the package works correctly with Python versions beyond 3.10 (fact sheet lists support only through 3.10).
- Current maintenance status and likelihood of updates for newer Python releases or security issues.
- Performance characteristics when extracting very large Deflate64 archives.
Package facts
| License | Apache 2.0 permissive |
| Python support | Supports the current Python release >=3.6 |
| Install friction | Medium. Platform-specific wheel |
| Runtime dependencies | None |
| Maintenance | Dormant 1,682 days since the last release |
| Last repo commit | |
| First released | |
| Downloads | 1,119,071 / month, #4,342 on PyPI 30-day window, as of 2026-08-14 |
| Known vulnerabilities | None known OSV.dev, checked 2026-08-14 |
| Classifiers | Development Status :: 3 - AlphaIntended Audience :: DevelopersLicense :: OSI Approved :: Apache Software LicenseOperating System :: MacOS :: MacOS XOperating System :: Microsoft :: WindowsOperating System :: POSIX :: LinuxProgramming Language :: PythonProgramming Language :: Python :: 3Programming Language :: Python :: 3.10Programming Language :: Python :: 3.6Programming Language :: Python :: 3.7Programming Language :: Python :: 3.8Programming Language :: Python :: 3.9Topic :: System :: ArchivingTopic :: System :: Archiving :: Compression |
Evidence: zipfile_deflate64-0.2.0-cp310-cp310-macosx_10_14_x86_64.whl; zipfile_deflate64-0.2.0-cp310-cp310-manylinux_2_17_x86_64.manylinux2014_x86_64.whl; zipfile_deflate64-0.2.0-cp310-cp310-win_amd64.whl; zipfile_deflate64-0.2.0-cp36-cp36m-macosx_10_14_x86_64.whl; zipfile_deflate64-0.2.0-cp36-cp36m-manylinux_2_17_x86_64.manylinux2014_x86_64.whl; zipfile_deflate64-0.2.0-cp36-cp36m-win_amd64.whl; zipfile_deflate64-0.2.0-cp37-cp37m-macosx_10_14_x86_64.whl; zipfile_deflate64-0.2.0-cp37-cp37m-manylinux_2_17_x86_64.manylinux2014_x86_64.whl; zipfile_deflate64-0.2.0-cp37-cp37m-win_amd64.whl; zipfile_deflate64-0.2.0-cp38-cp38-macosx_10_14_x86_64.whl; zipfile_deflate64-0.2.0-cp38-cp38-manylinux_2_17_x86_64.manylinux2014_x86_64.whl; zipfile_deflate64-0.2.0-cp38-cp38-win_amd64.whl; zipfile_deflate64-0.2.0-cp39-cp39-macosx_10_14_x86_64.whl; zipfile_deflate64-0.2.0-cp39-cp39-manylinux_2_17_x86_64.manylinux2014_x86_64.whl; zipfile_deflate64-0.2.0-cp39-cp39-win_amd64.whl
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