About Batch Compressing PDFs
PDF files may contain images of high resolution in addition to textual content. They could also have videos, graphics, sounds, and links, all of which make the file large. This would create problems while downloading, uploading and transferring. Thus, compressing PDF files is necessary, and when it is done to a large number of files at the same time, it is called batch compressing PDF. Batch compressing PDF saves cost, time and space. While batch compressing, the files are encrypted and protected with passwords, so that unauthorized entry is prevented. Security is thus maintained during batch compressing PDF.
How Batch Compressing PDFs is Carried Out
Batch compressing PDF is a relatively simple process, using the command line interface. However, apart from OS related tools, there are many types of software available online which help in batch compressing PDF. The compression techniques employed by them are that of lossless or lossy algorithms. The batch compressing PDF software decodes the file and stores it as a binary equivalent. Then the ASCII value of the binary equivalent is stored as the compressed file, and later used. Lossless algorithms are preferred as no data is lost during compression, and on decompressing, the file is brought to the initial condition with the same quality. Sometimes lossy algorithms need to be used too. Unused parts of a PDF file such as bookmarks, tags comments, thumbnails, and java scripts take up a lot of space. This is because each part needs to be encoded by a long code in the metadata of the file. Hence these unwanted elements are removed during compression. Text compression is accomplished by removing unwanted characters and/or by replacing redundant characters with a single equivalent character. The above given algorithms are the ones that make up PDF batch compressing software programs.
Why Batch Compressing of PDF Files is So Important
Though PDF files can be lightweight, scanned documents end up creating huge PDF files. Bulky PDF files are a burden to the corporate industry both for transmission and storage. This is why one should compress them. Batch compressing PDF is carried out to reduce the size of the PDF, so that it would be easy to distribute. This makes the PDF file apt for data distribution. It offers great flexibility to users and also enables limited storage use, decreased bandwidth necessity and minimal human effort.