"Compress" option in Finder .. Do you lose any quality?

Discussion in 'macOS' started by lip5016, Oct 7, 2014.

  1. lip5016 macrumors regular

    Jul 11, 2014
    Hello. I'm just wondering about the "Compress" option when you right-click anything in the "Finder".. I know that it makes a (.zip) file of whatever you select..

    Does this compression cause any reduction in quality? I have a TON of (.wav) and (.mp3) libraries that I would like to compress for storage purposes, but it is extremely important that there will be no loss in sound quality or file integrity..

  2. Alrescha macrumors 68020

    Jan 1, 2008
    No, you do not lose quality

    The compress option in Finder uses (as you have determined) Zip file compression which is lossless. See:


    You are thinking about audio file compression where clever algorithms shrink a file but try to make it sound the same.

  3. mfram macrumors 65816

    Jan 23, 2010
    San Diego, CA USA
    Yes, zip file compression is lossless. But it may not do a lot of good. WAV files are compressible. But mp3 and video are usually not very compressible with zip. If you have a lot of mp3 and video files, you aren't likely to save much disk space.

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