What is compressing PDF
PDFs are the standard when it comes to data storage and transfer, but sometimes these files can balloon in size, hindering its transfer. Compressing PDF files becomes essential, as it will reduce the file size, making it capable of transferring the file to other people.
Known PDF Compression Methods
Currently, there are seven formats used for compressing PDF files. They are JPEG, JPEG2000, ZIP, CCITT G3/G4, RLE, Flate and JBIG2. These formats fall under one of two categories, lossy and lossless compression. Lossless compression will not alter the quality of the file; these formats include ZIP, CCITT and Flate. Lossy compression has a higher ratio than lossless compression, but the quality is significantly reduced. These formats include JPEG and JPEG2000. The compression reduces the quality of the images and videos within the file permanently.
Compressing PDF yourself
When you are working on a PDF, you can compress it yourself, guaranteeing the quality of the file. Taking steps such as minimizing the number of font styles, and even using a smaller font size will reduce the file size. Also, using a grayscale over color will significantly reduce the file size as well. Finally, saving your file over the original will delete unused elements that are no longer visible.