Creating PDF files from documents is a trouble-free task, but sending the same uncompressed files is an incredible task because the size of the file is large enough to be sent through with an ease through electronic medium. Then why not decrease size of PDF before sending it. There are several issues involved which can help decrease size of PDF files. A user can simply make a small PDF file size if he/she pays attention to the resolution of the images, fonts used and which PDF version is being used in a document.
More over experience has shown that while saving a document a user must give Save As command instead of providing Save command. By giving Save As command the user usually overwrite the whole PDF file. By giving only Save command the size of PDF file is considerably increased. More over a user should also pay heed to removing extra space in between characters. This kind of compression is usually performed by an application that uses a formula or algorithm to determine the compression quality. Using algorithm can reduce the file size of up to 50% from its original size.
Furthermore, while using graphics in a document use vector based graphics as they are better than GIF files and look better and take lesser space. Avoid the use of bitmap image but if not possible prepare the bitmap image at a great compression rate. JPEG compression can also be used in a document on the other hand; most of the users are now using a newer version of JPEG 2000 algorithm. This format is suitable for grayscale or color images. On the other hand JBIG2 format provides compression rate superior to the CCITT or Zip algorithms.
Use RGB colors in your document in place of CMYK as less color take a small space in a PDF document. Compression rate in a PDF document could be lossy in which some information is lost or lossless in which while decompressing it all the information is restored. An individual can also use PDF optimizer command to decrease PDF file size quickly.