KGB Archiver's developers tout their tool for its high compression rate, but its performance in our tests left us dissatisfied.
This app opens with a compact, slightly cluttered interface with the basic components: a field for listing files to compress or expand, a field for specifying the location of the output file, the level of compression, options for passwords, and so forth. We initially liked that it offered nine levels of compression, from Minimal to Maximum, but our tests with the midrange Normal and Good settings weren't satisfying.
For instance, we compressed a 23.5Mb file using the Normal setting: KGB Archiver worked 3 minutes and 15 seconds to output a file the same size as the original file. Using the Very Good setting, KGB worked 21.5 minutes to turn the 23.5Mb file into another 23.5Mb file. Not what we were hoping for at all.
When we want a compressed file, we want the output to end up smaller than the original file. That's not at all what we got with this free app with many of its compression options. Using compression rates above Good led to desired results, but that leaves several options next to useless. There are better tools on the market, including other freeware options, and we suggest you try other programs before making your decision.
From Tomasz Pawlak:
KGB Archiver is free ZIP tool with a very high compression rate. If you are looking for the highest compression free zip software, this is for you. Because of its incredibly high rate of compression, it does have higher hardware requirements (1,5GHz clock and 256MB of RAM) but this should not trouble 99% of you out there. It is also a free encryption software app as it also offers AES-256 encryption which can be used to encrypt the archives. This is one of the strongest encryptions available, and one of the safest. This version is the first release on CNET Download.com.
What's new in this version:
This version is the first release on CNET Download.com.
Very resource intensive, meaning it's quite slow even on my 3.1 Ghz processor.
This compression software seems to be able to produce the worlds best compression on certain file types. It works extremely well for Microsoft office documents. It also works extremely well for quite a few other file types.
The only compressor that comes close is UHARC, or WinUHA (Which uses UHARC). UHARC is quite a fair bit faster, and will beat KGB on a few files. 7-Zip is a faster alternative to UHARC and will again, beat it on some file types, however it is quite rare for files under 100 MB.
KGB is slow and very resource intensive, however I do recommend you download it along side with WinUHA(UHARC) and 7-Zip for ultimate file compression on every file on the computer.
This KGB Archiver can compress some files even smaller than any other archiver out there. The reason that it takes longer than the usual compression program is because it's compressing files even smaller than usual. So, in fact, if another software program also compressed a file from 3.8 GB to 0.65 GB, then it would also take a long time too; It's just the nature of the math. You can't change physics. Some things just take longer when you compress things to extremes.
The cons are that it unexpectedly shuts down (crashes)when running sometimes. I don't know why. Maybe my machine is complex.