---
id: hpack
version: "4.2.0"
license: MIT
license_treatment: permissive
maintenance: active
---

# hpack — Pure-Python HPACK header encoding

License: permissive · Maintenance: active · Popularity: top 1,000 on PyPI

## Install

pip install hpack
uv add hpack
poetry add hpack

## Description

========================================
hpack: HTTP/2 Header Encoding for Python
========================================

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.. image:: https://raw.github.com/python-hyper/documentation/master/source/logo/hyper-black-bg-white.png

This module contains a pure-Python HTTP/2 header encoding (HPACK) logic for use
in Python programs that implement HTTP/2.

Documentation
=============

Documentation is available at https://hpack.readthedocs.io .

Quickstart:

.. code-block:: python

    from hpack import Encoder, Decoder

    headers = [
        (':method', 'GET'),...

## AI interpretation — verify before relying

hpack provides pure-Python HTTP/2 header encoding and decoding using the HPACK compression algorithm, enabling Python programs to implement HTTP/2 protocol support.

Verdict: hpack is a stable, actively maintained library for HTTP/2 header compression with zero dependencies, permissive licensing, and broad Python 3.10+ support. No known vulnerabilities and top-1000 popularity make it a reliable choice for HTTP/2 implementations.

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