inflate64
deflate64 compression/decompression library
Decision gist · record as of 2026-08-14
Yes, if you specifically need DEFLATE64 compression/decompression and can accept the copyleft license terms. The package is stable, supports current Python versions, has no known vulnerabilities, and carries minimal dependencies. However, aging maintenance (last commit November 2025, low activity) means security updates or bug fixes may be slow; evaluate whether standard zlib meets your needs first.AI-flagged interpretation of the facts on this page — verify before relying
Before you install
- Requires Python 3.9 or later; compiled wheels are provided for common platforms (macOS, Linux, Windows) and architectures.
- Medium install friction due to compiled wheels for multiple platforms and Python versions (3.9–3.14).
- Repository shows aging maintenance with last commit in November 2025 and minimal activity (2 stars), though the package remains in Production/Stable status.
License · maintenance · safety
LGPL-2.1-or-later (copyleft) — Licensed under LGPL-2.1-or-later (copyleft). You must disclose source code modifications and make the library available under the same license if you distribute derivative works; proprietary use requires careful compliance review.
last release 2025-11-28 (259 days) · last repo commit 2025-11-29 · 2 stars
0 known vulnerabilities (OSV.dev, 2026-08-14) · 9,073,414 downloads/mo, #1,563 on PyPI
Alternatives
Verify before relying
pip install inflate64
import inflate64
# Decompress
decompressor = inflate64.Inflater()
extracted = decompressor.inflate(compressed_data)
# Compress
compressor = inflate64.Deflater()
compressed = compressor.deflate(data)
compressed += compressor.flush()- Whether Enhanced Deflate (DEFLATE64) compatibility extends to all PKWARE-generated DEFLATE64 archives or only a subset
- Performance characteristics compared to standard zlib or other deflate implementations
- Whether the package handles streaming compression/decompression or only batch operations
What it is and what it does
inflate64 is a Python compression library that implements the Enhanced Deflate algorithm (also known as DEFLATE64, a PKWARE trademark) for both compression and decompression. It exposes two main classes: Inflater for decompressing data and Deflater for compressing data, each with straightforward method calls to perform their respective operations.
The package is a compiled extension (wheels available for macOS, Linux, Windows across multiple architectures and Python versions 3.9–3.14) with no runtime dependencies. It targets developers who need to work with DEFLATE64-compressed data, particularly in contexts where standard deflate is insufficient or where compatibility with PKWARE tools is required.
Use it for
- Decompress DEFLATE64-compressed archives or data streams from PKWARE tools or compatible sources
- Compress data using Enhanced Deflate when standard deflate compression is inadequate or interoperability with DEFLATE64 systems is needed
- Build archival or backup utilities that must handle DEFLATE64-compressed files
- Integrate DEFLATE64 support into data processing pipelines where zlib alone is insufficient
Worth the install?
AI-flagged interpretation of the facts on this page. Verify before relying on it.
Yes, if you specifically need DEFLATE64 compression/decompression and can accept the copyleft license terms.
The package is stable, supports current Python versions, has no known vulnerabilities, and carries minimal dependencies. However, aging maintenance (last commit November 2025, low activity) means security updates or bug fixes may be slow; evaluate whether standard zlib meets your needs first.
Install
inflate64 on PyPI
Before you install
Medium install friction due to compiled wheels for multiple platforms and Python versions (3.9–3.14). Repository shows aging maintenance with last commit in November 2025 and minimal activity (2 stars), though the package remains in Production/Stable status.
Requires Python 3.9 or later; compiled wheels are provided for common platforms (macOS, Linux, Windows) and architectures.
License in practice
Licensed under LGPL-2.1-or-later (copyleft). You must disclose source code modifications and make the library available under the same license if you distribute derivative works; proprietary use requires careful compliance review.
Quickstart
pip install inflate64
import inflate64
# Decompress
decompressor = inflate64.Inflater()
extracted = decompressor.inflate(compressed_data)
# Compress
compressor = inflate64.Deflater()
compressed = compressor.deflate(data)
compressed += compressor.flush()Verify before relying
- Whether Enhanced Deflate (DEFLATE64) compatibility extends to all PKWARE-generated DEFLATE64 archives or only a subset
- Performance characteristics compared to standard zlib or other deflate implementations
- Whether the package handles streaming compression/decompression or only batch operations
Package facts
| License | LGPL-2.1-or-later copyleft |
| Python support | Supports the current Python release >=3.9 |
| Install friction | Medium. Platform-specific wheel |
| Runtime dependencies | None |
| Maintenance | Aging 259 days since the last release |
| Last repo commit | |
| First released | |
| Downloads | 9,073,414 / month, #1,563 on PyPI 30-day window, as of 2026-08-14 |
| Known vulnerabilities | None known OSV.dev, checked 2026-08-14 |
| Classifiers | Development Status :: 5 - Production/StableLicense :: OSI Approved :: GNU Lesser General Public License v2 or later (LGPLv2+)Operating System :: MacOS :: MacOS XOperating System :: Microsoft :: WindowsOperating System :: POSIXOperating System :: POSIX :: LinuxProgramming Language :: PythonProgramming Language :: Python :: 3Programming Language :: Python :: 3 :: OnlyProgramming Language :: Python :: 3.10Programming Language :: Python :: 3.11Programming Language :: Python :: 3.12Programming Language :: Python :: 3.13Programming Language :: Python :: 3.14Programming Language :: Python :: 3.9Programming Language :: Python :: Implementation :: CPythonTopic :: Software Development :: Libraries :: Python Modules |
Evidence: inflate64-1.0.4-cp310-cp310-macosx_10_9_universal2.whl; inflate64-1.0.4-cp310-cp310-macosx_10_9_x86_64.whl; inflate64-1.0.4-cp310-cp310-macosx_11_0_arm64.whl; inflate64-1.0.4-cp310-cp310-manylinux2014_aarch64.manylinux_2_17_aarch64.manylinux_2_28_aarch64.whl; inflate64-1.0.4-cp310-cp310-manylinux2014_x86_64.manylinux_2_17_x86_64.manylinux_2_28_x86_64.whl; inflate64-1.0.4-cp310-cp310-musllinux_1_2_aarch64.whl; inflate64-1.0.4-cp310-cp310-musllinux_1_2_x86_64.whl; inflate64-1.0.4-cp310-cp310-win32.whl; inflate64-1.0.4-cp310-cp310-win_amd64.whl; inflate64-1.0.4-cp310-cp310-win_arm64.whl; inflate64-1.0.4-cp311-cp311-macosx_10_9_universal2.whl; inflate64-1.0.4-cp311-cp311-macosx_10_9_x86_64.whl; inflate64-1.0.4-cp311-cp311-macosx_11_0_arm64.whl; inflate64-1.0.4-cp311-cp311-manylinux2014_aarch64.manylinux_2_17_aarch64.manylinux_2_28_aarch64.whl; inflate64-1.0.4-cp311-cp311-manylinux2014_x86_64.manylinux_2_17_x86_64.manylinux_2_28_x86_64.whl; inflate64-1.0.4-cp311-cp311-musllinux_1_2_aarch64.whl; inflate64-1.0.4-cp311-cp311-musllinux_1_2_x86_64.whl; inflate64-1.0.4-cp311-cp311-win32.whl; inflate64-1.0.4-cp311-cp311-win_amd64.whl; inflate64-1.0.4-cp311-cp311-win_arm64.whl
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See also stream-inflate · zipfile-deflate64 · deflate · lzfse · Flask-Compress · deflate-dict · lzstring · pyppmd · zopfli · ncompress