5.7. zlib (Optional)
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## 5.7. zlib (Optional)

| zlib is designed to be a free, general-purpose, legally unencumbered — that is, not covered by any patents — lossless data-compression library for use on virtually any computer hardware and operating system. |
| -- The zlib web site https://www.zlib.net/

#### Unix

This library is almost certain to be installed on your system. If it isn’t or you don’t want to use the default library you can download it from https://www.zlib.net/.

#### Windows

zlib is part of our vcpkg-export bundles and is available at https://dev-libs.wireshark.org/windows/packages/.

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