Why Should You Opt for Compressing a PDF File
As the size of PDFs (Portable Document Format) is usually kept small by professional pdf creators, they can be used with ease. However, the user may still need significant space for the storage of these PDFs. So, if the user wants to save disk space while storing them or desire to send them via email as an attachment or upload them to a web page, it would be prudent to compress the file size of the PDF. Most PDF writing programs offer file compression options to the user.
Types of Some Commonly Used Compression Algorithms
If the user needs lossless compression of a PDF file, he/she may opt for the Flate compression, CCITT group 3 and 4 compression (apt for monochrome images), RLE compression, ZIP or LZW compression. Using the LZW or Flate method compression will help the user to compress either ASCII text or binary data. Both these methods of compressing a PDF file can discover and exploit several patterns in the input data, irrespective of whether the data consists of images or text. If the user is dealing with images that contain huge areas in black and white, the lossless compression option of RLE (Run Length Encoding) is the most appropriate one to use. For images with repeating patterns or those having large regions of single colors (like screen shots or simple images created using paint programs), ZIP should be chosen. If the loss of fidelity isn't an issue and the user wants to opt for high compression rates, lossy methods of compressing a PDF file (like JPEG compression) can be put to use.
Software to Compress PDF Files
The user will get a wide variety of software on the World Wide Web for compressing a PDF file. To evaluate the software, the free version can be used to compress a PDF file. However, it would be wise to keep in mind that the free version is only for a demo purpose and can't compete with the paid version. If the trial run of the free PDF compressor matches the user's requirements, he/she may then opt for the full version (paid) as a professional tool to compress multiple PDF files in large batches.