NXPowerLite Technology

How file optimization works

Compared with traditional compression, File Optimization takes a different approach to tackling the problem of large files. Its remarkable performance stems from the fact that many large files, such as PDFs and Microsoft Office documents, contain a great deal of hidden bloat that can be stripped away or 'optimized' in order to reduce file size without changing the file format or affecting the visual integrity of the file.


File Optimization tackles individual elements inside a document, assessing how to reduce each component in turn. By examining each component in isolation it will choose the most effective method of reduction rather than applying general settings across the whole file. This approach creates much smaller files that remain in the same format, so no readers or decompression tools are required.


File Optimization technology is designed to avoid negatively affecting document compliance obligations. The technology simply makes imperceptible visual trade-offs to reduce file size. The primary focus is ensuring embedded media (photos, graphics etc.) are stored in the documents efficiently while unseen background data is purged from the files. File Optimization sets out to maintain the visual integrity of the content so at all times optimized files should be indistinguishable from the originals by the human eye.

We encourage you to check the compliance requirements of your industry carefully and if there is any need for further clarification on what File Optimization does to files do get in touch.

Before rolling out NXPowerLite, I ran it past the council’s legal team and there have been no compliance issues with using the software. Physically, the results look exactly the same to the naked eye – something that is critical when dealing with court documents.
— Neil Harvey, Server Support and Development Officer for Caerphilly County Council

PDF Compression

PDF files are most often scanned physical documents or documents that have been created entirely digitally often referred to as 'native' or 'born digital' PDFs. NXPowerLite is able to reduce the size of both types of PDF by resizing images, adjusting image formats and quality levels while removing background or hidden data that isn't needed for normal use of the file.

JPEG Compression

Most JPEG images are produced by digital cameras, which are optimized to preserve as much information as possible in order to allow the image to be edited and post-processed. Most of this information is not visually detectable and unnecessarily increases the size of the file. NXPowerLite uses a number of techniques to reduce the amount of data in JPEG files, resulting in impressive size reduction without discernible loss of quality.

Microsoft Office Compression

Microsoft Office files contain an abundance of content that can be optimized; from oversized images and old fast save information to hidden data in embedded objects. NXPowerLite can selectively optimize each of these elements within the files to create leaner, smaller documents, speadsheets and presentations.

TIFF Compression*

NXPowerLite can shrink uncompressed TIFF images by applying lossless LZW compression. As this built-in compression method for TIFF files is lossless it's a great opportunity to reclaim server space.

* only currently available in NXPowerLite for File Servers

Happy to help

The information above explains exactly what our technology does to each file type. With it we hope you'll be able to make an informed choice about using our software. Please contact us if you have any questions we haven't covered and we'll be happy to help.