Zlib
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== Specifications == | == Specifications == | ||
| + | * ZLIB Specification v3.1 - ''No copy found. There are dead links to it in e.g. the [https://zlib.net/fossils/zlib-0.95.tar.gz zlib 0.95] README file.'' | ||
| + | * [https://web.archive.org/web/20030426211434/http://mirror.cs.wisc.edu/pub/mirrors/ghost/gzip_doc/zlib-3.2.doc ZLIB Specification v3.2] (from archive.org) | ||
* RFC 1950: ZLIB Compressed Data Format Specification version 3.3 | * RFC 1950: ZLIB Compressed Data Format Specification version 3.3 | ||
Revision as of 16:10, 18 August 2022
zlib format is a variant of the DEFLATE compressed data format. It adds a lightweight container, a small amount of configurability, and error checking.
zlib is also the name of a software library that supports the zlib format, and other formats related to DEFLATE.
There are many formats and protocols that use, or may use, zlib format. A notable example is PNG.
Contents |
See also
Identification
The first byte of a zlib datastream has eight possible values: 0x08, 0x18, 0x28, ..., 0x78.
If the first two bytes are interpreted as a big-endian integer, it is always a multiple of 31.
Specifications
- ZLIB Specification v3.1 - No copy found. There are dead links to it in e.g. the zlib 0.95 README file.
- ZLIB Specification v3.2 (from archive.org)
- RFC 1950: ZLIB Compressed Data Format Specification version 3.3
Software
- zlib data compression library
- CloudFlare fork of zlib
- zlib-ng
- Puff - Lightweight decompression software included with zlib (contrib/puff)
- miniz
- zopfli - zlib compressor highly optimized for file size
- Offzip
- Deark
See also DEFLATE#Software.
