PDF files generated from an electronic source - such as a Word document, a computer generated report, or spreadsheet data - will usually be formed of a combination of text and images. By reducing the resolution of these images and choosing an efficient image encoding these files can be dramatically reduced.
So even documents that appear to be just text can often be entirely images. Scanners often capture document pages as high resolution images without compression.
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.
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.
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