Programs to Compress Files
Programs to compress files are especially useful for very large documents. The problem with large documents is that sometimes there is difficulty in uploading them. Their size may exceed email attachment capacity or use up too much storage. Fortunately you can use a compression program to compress the file so that it is easier to handle.
Using Programs to Compress Files
Any file compression program works by finding out similarities and eliminating the redundant ones. For example, if you are trying to compress an image, the file compression program will look for large areas that have almost same pixel values (for example parts of the blue sky), then assign coordinates to each of these pixels, and finally assign the value to all the coordinates. Similarly, in a text file it will set up a database and count occurrences of words. It will simply replace all similar words by their values in the database, so that the file size becomes smaller. Of course a variety of advanced compression techniques are also used, but most of these algorithms build on the simple outline explained above.
Examples of Programs to Compress Files
Nowadays almost every type of software uses some file compression technique, even though it is not a dedicated compress files program. In addition to the well-known compression programs such as zip, jpg, mp3 etc., almost all text editors such as Word, Excel, PDF etc. come with inbuilt compression algorithms. As for music files, all the codecs available today employ file compression techniques to reduce audio and video file sizes without reducing quality to a great extent.