+**Zlib** is a free, widely used software library for [data compression](/wiki/Data_compression). It offers lossless [compression](/wiki/Compression) and decompression, making it a critical, cross-platform tool for reducing file sizes and managing data streams efficiently.
+## See also
+- [Gzip](/wiki/Gzip)
+- [Deflate](/wiki/Deflate)
+- [File format](/wiki/File_format)
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