Rok Entertainment Group has upgraded its Blubox image compressor application.

The latest upgrade, v4.0, offers compression of digital images as well as supporting all non-proprietary Zip formats, "thus ensuring complete compatibility", says the developer.

This means that the software will allows users to create, read and extract from existing Zip archives.

It is designed to improve the digital photo sharing experience over the internet as well as protecting private and personal information.

Laurence Alexander, CEO of Rok, says Zip provides acceptable compression for text-based files, but has been unable to cope with the demands of the modern file formats.

He explains: "There is a massive gap in the market for software that can offer compatibility with existing Zip products, but go much further by providing the user with the ability to significantly shrink their digital photos without sacrificing the hi-Resolution quality of the original image file. This is the premium that Blubox offers."