PAQ8 - Download Page You can download various paq8 versions here

PAQ8 is a series of data compression archivers with the world highest compression ratio. Specialized versions of PAQ have won the Hutter Prize and the Calgary Challenge. PAQ is free software distributed under the GNU General Public License. Original PAQ8 was developed by Matt Mahoney. Many people contibuted its further development - Matt Mahoney, Serge Osnach, Alexander Ratushnyak, Bill Pettis, Przemyslaw Skibinski, Matthew Fite, wowtiger, Andrew Paterson, Jan Ondrus, Andreas Morphis, Pavel L. Holoborodko, KZ., Simon Berger, Neill Corlett.

Links:

Compression benchmarks:

Browse Files for PAQ8

File nameSizeDateCompression *Notes / Link
fp8_v3.zip139.4 KB2012-05-13?
fp8_v2.zip153.3 KB2012-04-1013.1% 30.7% 22.1% 21.9%
fp8_v1.zip137.8 KB2010-05-0213.1% 29.9% 22.1% 21.3%
paq8px_v69.zip383.2 KB2010-04-2615.2% 36.9% 22.0% 23.7%
paq8kx_v7.zip143.9 KB2010-02-1716.1% 37.7% 21.8% 23.8%version by Bill Pettis
paq8kx_v4.zip389.1 KB2010-02-0716.1% 37.5% 21.7% 23.8%
paq8px_v68p3.zip387.0 KB2010-02-0315.5% 36.9% 22.0% 23.7%version by Bill Pettis
paq8px_v68e.zip382.5 KB2010-01-2815.3% 36.9% 22.0% 23.7%version by Bill Pettis
paq8pxpre.zip335.1 KB2010-01-0915.2% 36.8% 22.0% 32.5%using Precomp by Christian Schneider
paq8px_v67.zip297.3 KB2009-11-0515.2% 36.9% 22.0% 23.7%
paq8k3.zip78.6 KB2009-09-1414.9% 30.8% 1.3% 23.5%version by Bill Pettis
paq8kx_v1.zip222.9 KB2009-07-1516.0% 36.6% 22.0% 23.6%
paq8px_v44.zip386.7 KB2009-06-0115.2% 36.3% 22.0% 23.5%
paq8px_v9.zip189.9 KB2009-05-0815.1% 36.2% 22.0% 23.5%
paq8px_v1.zip196.1 KB2009-04-2515.1% 36.2% 22.0% 23.5%
paq8k2.zip93.0 KB2009-03-1014.7% 28.4% 1.3% 22.1%version by Bill Pettis
paq8p.zip177.7 KB2008-08-2514.9% 34.4% 21.8% 23.4%
paq8o10t.zip114.4 KB2008-06-1114.8% 34.8% 21.8% 23.3%
paq8o9.zip110.6 KB2008-02-1614.9% 34.4% 21.8% 23.4%
paq8o8pre.zip311.2 KB2008-01-1514.9% 34.2% 21.8% 32.3%using Precomp by Christian Schneider
paq8o8.zip123.5 KB2007-10-2314.9% 34.4% 21.8% 23.4%
paq8o7.zip120.9 KB2007-10-1614.9% 34.4% 21.7% 23.4%
paq8o6.zip117.2 KB2007-09-2814.9% 34.4% 21.5% 23.4%
paq8fthis4.zip152.3 KB2007-09-2713.5% 32.1% 21.3% 22.2%
paq8o5.zip122.6 KB2007-09-2114.9% 34.4% 20.8% 23.4%
paq8o4v2.zip88.9 KB2007-09-1714.9% 34.4% 20.6% 23.5%
paq8o3.zip97.9 KB2007-09-1114.9% 34.4% 20.6% 23.5%
paq8fthis3.zip76.8 KB2007-09-0813.5% 32.1% 20.6% 22.2%
paq8o2.zip147.0 KB2007-08-2414.9% 34.4% 19.7% 23.5%
paq8o.zip151.8 KB2007-08-2214.9% 34.4% 19.7% 23.5%
paq8n.zip82.6 KB2007-08-1814.9% 34.4% 19.7% 23.5%
paq8fthis2.zip75.8 KB2007-08-1213.5% 32.1% 19.8% 22.2%
paq8m.zip84.6 KB2007-08-0414.9% 34.4% 17.1% 23.5%
paq8hp12any.zip534.3 KB2007-05-2011.4% 44.7% 0.4% 20.7%version by Alexander Ratushnyak
paq8l.zip179.6 KB2007-03-0814.9% 34.4% 14.2% 23.5%
paq8k.zip107.3 KB2007-02-1315.9% 35.7% 14.3% 23.5%version by Bill Pettis
paq8jd.zip287.0 KB2007-01-1914.9% 34.1% 14.2% 23.4%
paq8i.zip990.2 KB2006-08-1813.5% 41.1% 14.2% 22.2%
paq8g.zip977.4 KB2006-03-0313.5% 40.6% 14.2% 22.2%
paq8f.zip146.7 KB2006-02-2813.5% 32.1% 14.2% 22.2%
paq8e.zip786.9 KB2006-02-2313.5% 39.9% 14.2% 22.1%
paq8d.zip804.6 KB2006-02-1513.5% 31.3% 14.2% 22.1%
paq8c.zip801.4 KB2006-02-1313.5% 31.3% 14.2% 22.1%
paq8b.zip817.3 KB2006-02-0813.5% 39.5% 14.2% 22.1%
paq8a.zip64.4 KB2006-01-2713.5% 31.3% 14.2% 22.1%

* Saved space compared to standard ZIP archive for binary/html-en/jpeg/ppt data (tested with -6 level).