Lossless compression is a way of reducing the size of a computer file without losing any of its original information. This means that when the file is opened or used again, it looks exactly the same as before it was compressed. This is different from lossy compression, where some information is lost to make the file even smaller. Lossless compression is useful when you need to keep all the details in a file, like when storing important documents or safely compressing software and certain types of images or audio files. Popular lossless compression formats include ZIP and PNG.
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