Reasons to Make PDF Smaller
Why should one take the pains to make PDF smaller? Simple reason- because it is huge. PDF files, if handled ignorantly, end up swallowing huge chunks of hard-disk space, much more than actually necessary for their storage. While the memory consumption is negligible in case of a handful of files, steps to make PDF smaller in size is of paramount importance in case of organizations that scan millions and millions of paper records everyday for digitizing. Also, the smaller the file, the faster and easier it is to transfer it via a network. Websites hosting such smaller PDF files are easy to index by search engines, and hence possess a greater chance of being viewed by clients across the world.
The Compression Technique
So, how to make PDF smaller? That's where the compression procedure comes into play. Compression reduces the PDF file size by eliminating repetitive text, unused images, metadata, comments etc. It also helps manage the myriad of images, fonts and color modes that consume unwarranted memory, thus bundling up precious PDF documents into smaller, user-friendly packages. Normal PDF documents possess an average compressibility of about 50% and certain text-only files can be shrunk up to an attractive 99%. Compression algorithms such as ZIP, Flate, LZW, JPEG, JPEG2000, etc. apply their reducing logic on different objects, thus assisting to make PDF smaller than the original.
Steps to Make PDF Smaller
The steps that should be taken to make PDF smaller are left to the developer. Usually the PDF applications themselves come with a built-in compression function, which offers basic compressibility options. For advanced PDF file-size reduction, a wide variety of Compressors are available on the internet as freeware or shareware downloadable on a trial basis. These compression tools offer customization options and algorithms that affect the output file's quality, size, compressibility, transmission speed and time, and de-compressibility. An experienced user usually knows which technique is best suited for which object, his knowledge aiding to make PDF smaller. The enormous source PDF file is fed into the software tool, processed with the required compressibility settings, and lo, the output is a tiny document with all the necessary objects intact!