Files are just a bunch of bits, how is it possible to make the filesize smaller without removing any of those bits?
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Lossless compression is a type of data compression where the original data can be reconstructed exactly from the compressed data. This is in contrast to lossy compression, where some information is lost during the compression process. Lossless compression is often used for archiving or storing important data because it ensures that no information is lost during the compression process.
There are many different algorithms used for lossless compression, but they all work by reducing redundancy in the data. Redundancy means that there is extra information that isn’t needed to reconstruct the original data. For example, if you have a text file with lots of repeated words, you can remove the redundant words and still reconstruct the original text perfectly.
Lossless compressions are usually less effective than lossy compressions because they can’t make use of as much redundancy in the data. However, they are still useful when it’s important to preserve all of the original information, such as when compressing medical images or computer programs
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