Version 1.2.13 was explicitly pushed to address critical runtime maintenance, security fixes, and build-system bugs leftover from the short-lived 1.2.12 iteration. Metric / Parameter Value / Technical Detail Late 2022 (November) Core Dependency Required for libpng , OpenSSL, Git, and Python's zlib module Compression Standard DEFLATE algorithm (RFC 1950 and RFC 1951) Licensing Permissive, open-source Zlib License Index of /downloads/releases/sources/libzlib-1.2.13

Stable release of zlib (data compression library implementing DEFLATE). Source distributed as zlib-1.2.13.tar.xz.

Version 1.2.12 was released in March 2022. Version , released just seven months later, was a critical update that every user and developer should have applied. Here are the key improvements it brought:

Released in late 2022, version 1.2.13 remains a foundational block across countless Linux distributions, system tools, and enterprise compilation environments. This guide breaks down what this archive contains, why it uses dual-layer compression, and exactly how to work with it. Anatomy of the Long Filename: zlib-1.2.13.tar.xz