madler / zlib
git clone https://github.com/madler/zlib.git
v1.3.2 · 8mo ago
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A general-purpose, thread-safe C library for lossless data compression in the deflate, zlib, and gzip formats.
Why you might care
It is the de facto standard deflate implementation, used widely as a dependency by other software and language runtimes, and it is documented via zlib.h and the RFCs 1950-1952. Choose it when you need interoperable gzip/zlib streams or want to build on a long-established, portable C codebase.
+7
stars, 24h · #4,234
+~19
stars, 7 days · #8,596
+~82
stars, 30 days · #8,408
7.2k
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2.9k
forks · 120 open issues
Star history (as recorded here)
LanguageC
License—
Created2011-09-10 (15y ago)
Last push1mo ago
Watchers180
OwnerUser
Seen on GitHub Trending
- 2026-10-25 — #12 daily in c · +5 ★
- 2026-10-24 — #11 daily in c · +4 ★
- 2026-10-21 — #5 daily in c · +5 ★
- 2026-10-20 — #5 daily in c · +8 ★
Links
- GitHub: github.com/madler/zlib
- Homepage: http://zlib.net/
- Releases · Issues · Hacker News mentions
README
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Blurb generated by claude-haiku-5-5 today. Star deltas marked ~ are extrapolated from partial history.