PDF File Sizes
While PDF file sizes are usually optimized for screen display, files that contain a large number of images, objects or system fonts can sometimes become very large in size. If image files that are in tiff format, or have high resolution, are embedded in the PDF file without compressing them, then the resulting file size becomes large. Moreover, if the PDF file is being created from publishing software such as Corel Draw or Illustrator, then this software embeds a number of objects, or tags, to make the PDF file backward version compatible, again increasing size considerably. These objects are not needed for ordinary viewing purposes or sending through email, and so can be safely stripped off to reduce the PDF file size.
How to Reduce PDF File Size
PDF file sizes can be reduced in a number of ways. Often, a PDF printing software such as Primo PDF or Nitro PDF can be installed and then the PDF file can be printed out to these software, thus stripping away unnecessary embedded objects and reducing the file size. However, if the file also contains high resolution images, then it is best to resize the objects individually, using an image resizing program, or an online resizing service. Saving the images to a compressed format such as jpg decreases file size by as much as 60-70%, and then these images can be re-inserted into the PDF document to greatly reduce the PDF file size.
Options to Reduce PDF File Size
PDF file size can be reduced either by using acrobat professional version, or by using third party software as mentioned before, or by using online compression services. The first option is the best since acrobat can inspect each of the images and objects separately and optimize the file size either for printing or screen viewing; however, if cost is a constraint, then the other two options can also be used.