The specifications for zlib and deflate were written by Peter Deutsch (Jean-loup co-authored the deflate spec), and Glenn Randers-Pehrson edited and submitted them to the Internet Engineering Task Force (IETF) as Internet Drafts. As of 22 May 1996, both have officially achieved RFC status. Variously formatted versions are available from many locations around the world, as is the related gzip specification (also written by Peter and also now an RFC).
zlib specification, revision 3.3 (RFC 1950):
HTML format:
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ASCII text:
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IETF copy (US West)
IETF copy (US Central)
IETF copy (US East)
IETF copy (Canada)
IETF copy (UK)
IETF copy (Italy)
IETF copy (South Africa)
IETF copy (Australia)
IETF copy (Thailand)
IETF copy (Japan)
US letter-size PostScript:
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IETF copy (US West)
IETF copy (US Central)
IETF copy (US East)
IETF copy (UK)
IETF copy (Italy)
IETF copy (South Africa)
IETF copy (Australia)
IETF copy (Thailand)
IETF copy (Japan)
A4-size PostScript:
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deflate specification, revision 1.3 (RFC 1951):
HTML format:
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ASCII text:
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US (Texas)
IETF copy (US West)
IETF copy (US Central)
IETF copy (US East)
IETF copy (Canada)
IETF copy (UK)
IETF copy (Italy)
IETF copy (South Africa)
IETF copy (Australia)
IETF copy (Thailand)
IETF copy (Japan)
US letter-size PostScript:
US (California)
US (Virginia)
US (Texas)
IETF copy (US West)
IETF copy (US Central)
IETF copy (US East)
IETF copy (UK)
IETF copy (Italy)
IETF copy (South Africa)
IETF copy (Australia)
IETF copy (Thailand)
IETF copy (Japan)
A4-size PostScript:
US (California)
US (Virginia)
US (Texas)
gzip specification,
revision 4.3 (RFC 1952):
HTML format:
US (California)
US (Virginia)
US (Texas)
ASCII text:
US (California)
US (Virginia)
US (Texas)
IETF copy (US West)
IETF copy (US Central)
IETF copy (US East)
IETF copy (Canada)
IETF copy (UK)
IETF copy (Italy)
IETF copy (South Africa)
IETF copy (Australia)
IETF copy (Thailand)
IETF copy (Japan)
US letter-size PostScript:
US (California)
US (Virginia)
US (Texas)
IETF copy (US West)
IETF copy (US Central)
IETF copy (US East)
IETF copy (UK)
IETF copy (Italy)
IETF copy (South Africa)
IETF copy (Australia)
IETF copy (Thailand)
IETF copy (Japan)
A4-size PostScript:
US (California)
US (Virginia)
US (Texas)
Click here for an informal explanation of the deflate algorithm.
Click here to go to the PNG Documentation Page.
Click here to return to the zlib Home Page.
Copyright © 1996-1999 Greg Roelofs.