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The percentage of compression varies enormously with the nature of the data you intend to compress.<br />
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It's not the same to compress a text file than a picture image, an executable program or a sound archive.<br />
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In fact, some files are already-compressed, this is, a .PCX or .GIF file (to mention a couple of examples) are compressable; but a .JPG is not (it's a pre-compressed format).<br />
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Classic compressors, like PKZIP, RAR, ARJ and others, hang around computer world since more than a decade ago.<br />

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The percentage of compression varies enormously with the nature of the data you intend to compress.

It's not the same to compress a text file than a picture image, an executable program or a sound archive.

In fact, some files are already-compressed, this is, a .PCX or .GIF file (to mention a couple of examples) are compressable; but a .JPG is not (it's a pre-compressed format).

Classic compressors, like PKZIP, RAR, ARJ and others, hang around computer world since more than a decade ago.


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I want to compress a 5.7 MB file to half or more its size, how do I do that?
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I want to compress a 5.7 MB file to half or more its size, how do I do that?

File Compression

Hardware includes cell phones and other digital living devices, tablets, computers, servers, peripherals and components, printers and scanners, gaming consoles, networking hardware such as routers, hubs, switches and modems, storage devices and security equipment such as firewalls and other appliances.