Defining PDF Shrinking
Shrinking a Portable Document Format or PDF file is the same as compressing its size. PDF files are intended for high quality print output, so it consumes a lot of memory causing issues while transmitting via the web in its original format. Diminishing the unused/redundant content of a PDF file is PDF shrinking, and it helps in storage and to gain a better transfer rate via a network. Shrunken documents are lightweight and use up minimal bandwidth. A large PDF file which comprises of huge amounts of text, different embedded fonts, uncountable images and a myriad of colors in the CMYK mode, can be a nightmare for a user. Free PDF shrinkers contain techniques to format text and images such that they occupy very little space.
A whole batch of PDF files may be compressed together or the files can be reduced individually using a variety of routines called shrinker algorithms. A lossless algorithm can reconstruct data with higher accuracy, but it is the lossy method that squeezes the file in to occupy the barest possible memory. In case of grayscale and bi-tonal images the RLE and the ZIP algorithms shrink large, repetitive black and white areas. JPEG, JPEG2000, etc. are special routines for scaling polychromatic images. The Flate algorithm converts a file into blocks or trees for reduction, while the LZW uses a look-up table for substituting patterns. Free PDF shrinkers either offer highly-compressed-low-quality outputs, or vice versa.
Free PDF Shrinkers
There have been a torrential number of free PDF shrinkers on the e-Market lately. Such freeware and software trials can be found using a search engine by using a few choice keywords and downloaded after confirming its functionality. Alternatively, the same can be achieved by using an online shrinking tool which requires uploading of the original PDF file on the web. The settings can be customized by the user based on different factors and the images, fonts, and page-structure can be optimized accordingly. While downloading the tool would be a better option for enormously-sized files, the online tool would suffice for smaller ones. Choosing the free PDF shrinker must be such that efficiency, readability, accuracy goes hand-in-hand with the necessity to reduce the file dimension.