PKZIP

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PKZIP

This article is about the software. For the file format, see ZIP.

PKZIP is a line of compression/archiving software, known for its association with the ZIP file format. It was developed by PKWARE.

In some versions, the utility named PKZIP only does compression, and the companion PKUNZIP utility does decompression.

Native formats

v0.80-beta (1989-01-10): PKZ080.ZIP
v0.90 (1989-02-01): pkz090.exe
v0.92 (1989-03-06): pkz092.exe
v1.01 (1989-07-21): pkz101.exe
v1.02 (1989-10-01): pkz102.exe
v1.10 (1990-03-15): pkz110.exe
- v1.10 "export" version (no encryption): pkz110eu.exe
v1.93-alpha (1991-10-15): PKZ193A.EXE
v2.04c (1992-12-28): PKZ204C.EXE
v2.04e (1993-01-25): PKZ204E.EXE
v2.04g (1993-02-01): PKZ204G.EXE
v2.50 (1999-03-01): pk250dos.exe
Various versions at old-dos.ru
pk250upd.zip - Upgrades registered 2.04g to 2.50

v2.01 (1996-02-15): pkzws201.zip
v2.50 (1996-09-15): pk250w16.zip
v2.60 (1997-12-15): pk260w16.exe
v2.60.02 (1998-07-15): [1] → pk262w16.exe
v2.60.03 (1998-11-01): pk263w16.exe

v2.50 (1998-04-15): pk250c32.exe
- v2.50, DEC Alpha architecture: AlphaNT FTP → Utilities/pk250c_a.exe
v4.00: pkzc400s.exe

(Selected versions, mainly historical)

Caution: Some 2.x versions are adware, and may be detected as malware.

v2.50 (1996-09-15): pk250w32.zip
v2.60 (1997-12-15): pk260w32.exe
- v2.60, DEC Alpha architecture: AlphaNT FTP → Utilities/pk260w_a.exe
v2.60.01(?) (1998-06-01): internet.au - CDrom Disc 3, Dec. 1998 → emailftp/win95/pk26cnet.exe
v2.60.02 (1998-07-15): Best Sellers 33 → _UTILS/PKWARE/PK262WSP/pk262wsp.exe
v2.60.03 (1998-11-01): pk263wsp.exe
v2.70 (1999-06-01): pk270wsp.exe
v4.00: [2] → pkzw400s.EXE