pylsqpack
Python wrapper for the ls-qpack QPACK library
Decision gist · record as of 2026-08-14
Yes, if you are building or testing HTTP/3 protocol support. The package is actively maintained, has no known vulnerabilities, carries a permissive license, and provides a straightforward binding to a well-established QPACK implementation. Install friction is moderate due to compiled wheels, but pre-built binaries are available for common platforms. Not necessary for standard HTTP/1.1 or HTTP/2 applications.AI-flagged interpretation of the facts on this page — verify before relying
Before you install
- Requires Python 3.10 or later; compiled wheels available for common platforms (x86_64, ARM, i686, Windows).
- Medium install friction due to compiled wheels for multiple platforms and architectures.
- Actively maintained with recent releases; requires Python 3.10 or later.
License · maintenance · safety
BSD-3-Clause (permissive) — BSD-3-Clause is permissive; you may use, modify, and distribute this package freely in commercial and private projects with minimal restrictions.
last release 2026-03-29 (138 days) · last repo commit 2026-03-29 · 13 stars
0 known vulnerabilities (OSV.dev, 2026-08-14) · 3,171,749 downloads/mo, #2,713 on PyPI
Alternatives
Verify before relying
pip install pylsqpack
from pylsqpack import Decoder, Encoder
decoder = Decoder()
encoded_data = b'...'
headers = decoder.feed_data(encoded_data)
encoder = Encoder()
compressed = encoder.encode(headers)- Whether the package is actively used in production HTTP/3 implementations or primarily for protocol testing.
- Performance characteristics and compression ratio compared to alternative QPACK implementations.
- API stability guarantees and backward compatibility policy across minor versions.
What it is and what it does
pylsqpack is a Python binding for the ls-qpack C library, providing native QPACK compression and decompression for HTTP/3 headers. QPACK is the header compression scheme specified for HTTP/3, and this package exposes Decoder and Encoder objects that allow Python applications to compress headers for transmission or decompress received headers.
The package is compiled to native code for multiple platforms and architectures, making it suitable for HTTP/3 protocol implementations, proxies, and testing tools. It has no runtime dependencies beyond Python itself and supports Python 3.10 through 3.14. The library is actively maintained and carries a permissive BSD-3-Clause license.
Use it for
- Building HTTP/3 clients or servers that need to compress and decompress header frames.
- Testing HTTP/3 protocol implementations with correct QPACK encoding and decoding.
- Integrating QPACK support into proxy or gateway applications handling HTTP/3 traffic.
- Protocol analysis tools that need to parse or generate HTTP/3 header compression.
- Benchmarking or comparing QPACK compression efficiency in network applications.
Worth the install?
AI-flagged interpretation of the facts on this page. Verify before relying on it.
Yes, if you are building or testing HTTP/3 protocol support.
The package is actively maintained, has no known vulnerabilities, carries a permissive license, and provides a straightforward binding to a well-established QPACK implementation. Install friction is moderate due to compiled wheels, but pre-built binaries are available for common platforms. Not necessary for standard HTTP/1.1 or HTTP/2 applications.
Install
pylsqpack on PyPI
Before you install
Medium install friction due to compiled wheels for multiple platforms and architectures. Actively maintained with recent releases; requires Python 3.10 or later.
Requires Python 3.10 or later; compiled wheels available for common platforms (x86_64, ARM, i686, Windows).
License in practice
BSD-3-Clause is permissive; you may use, modify, and distribute this package freely in commercial and private projects with minimal restrictions.
Quickstart
pip install pylsqpack
from pylsqpack import Decoder, Encoder
decoder = Decoder()
encoded_data = b'...'
headers = decoder.feed_data(encoded_data)
encoder = Encoder()
compressed = encoder.encode(headers)Verify before relying
- Whether the package is actively used in production HTTP/3 implementations or primarily for protocol testing.
- Performance characteristics and compression ratio compared to alternative QPACK implementations.
- API stability guarantees and backward compatibility policy across minor versions.
Package facts
| License | BSD-3-Clause permissive |
| Python support | Supports the current Python release >=3.10 |
| Install friction | Medium. Platform-specific wheel |
| Runtime dependencies | None |
| Maintenance | Actively maintained 138 days since the last release |
| Last repo commit | |
| First released | |
| Downloads | 3,171,749 / month, #2,713 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/StableEnvironment :: Web EnvironmentIntended Audience :: DevelopersOperating System :: OS IndependentProgramming Language :: PythonProgramming Language :: Python :: 3Programming Language :: Python :: 3.10Programming Language :: Python :: 3.11Programming Language :: Python :: 3.12Programming Language :: Python :: 3.13Programming Language :: Python :: 3.14Topic :: Internet :: WWW/HTTP |
Evidence: pylsqpack-0.3.24-cp310-abi3-macosx_10_9_x86_64.whl; pylsqpack-0.3.24-cp310-abi3-macosx_11_0_arm64.whl; pylsqpack-0.3.24-cp310-abi3-manylinux1_i686.manylinux_2_28_i686.manylinux_2_5_i686.whl; pylsqpack-0.3.24-cp310-abi3-manylinux2014_aarch64.manylinux_2_17_aarch64.manylinux_2_28_aarch64.whl; pylsqpack-0.3.24-cp310-abi3-manylinux2014_x86_64.manylinux_2_17_x86_64.manylinux_2_28_x86_64.whl; pylsqpack-0.3.24-cp310-abi3-musllinux_1_2_aarch64.whl; pylsqpack-0.3.24-cp310-abi3-musllinux_1_2_i686.whl; pylsqpack-0.3.24-cp310-abi3-musllinux_1_2_x86_64.whl; pylsqpack-0.3.24-cp310-abi3-win32.whl; pylsqpack-0.3.24-cp310-abi3-win_amd64.whl; pylsqpack-0.3.24-cp310-abi3-win_arm64.whl
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See also hpack · brotli · brotlipy · pylzss · compress-pickle · bencode.py · astc-encoder-py · w3lib · Flask-Compress