Home > Questions

Does the Compress option in Finder cause quality loss?

Hi, I'm curious about the "Compress" option that appears when you right-click anything in Finder. I know it makes a .zip file when you select the option. But does this compression cause any quality loss? I have tons of (.wav) and (.mp3) libraries that I would like to compress for storage purposes. It is extremely important that there will be no loss in sound quality or file integrity. Any thoughts?

Best Answered by

iBoysoft author Jenny Zeng

Jenny Zeng

Answered on Friday, August 11, 2023

No, the built-in Compress option on Mac doesn't reduce file quality.

If you right-click on a file and select Compress on Mac, the operating system will make a compressed file with the ZIP format. It does this by creating an index of the long binary and character sequences in the file and assigning them shorter symbols. The reduction of characters and bytes is the reason why the ZIP file becomes smaller in size.

When you unzip the file, the information that was replaced will be restored. So there's no difference between the source and unzipped file. In a word, ZIP is a lossless compression format.

Although this Compress option on Mac is convenient, it doesn't allow you to choose a different compression level or encrypt the ZIP file. If you have these needs, you can use iBoysoft MagicMenu to compress your files instead.

It lets you zip a file or multiple files on Mac at once with a right-click, choose a higher compression level to further reduce file size, and set a password to protect the zipped file.

Click the button below to download it for free!

Read Also:

How to Compress Audio Files on Mac?

People Also Ask

Read More Questions

Read More Advice From iBoysoft's Computer Experts

Cómo comprimir un archivo o carpeta en Mac

Cómo comprimir o descomprimir archivos o carpetas en Mac (paso a paso)

Guía para aprender cómo comprimir archivos y carpetas en Mac y cómo descomprimir archivos y carpetas en Mac.

How to Compress Audio Files on Mac

How to Compress Audio Files on Mac?

It tells how to compress audio files on Mac in 2 ways, including using iBoysoft MagicMenu and macOS QuickTime Player.

How to Tips


How to Zip or Unzip files or folders on Mac (Step-by-step)

Guide to learning how to zip files and folders on Mac and how to unzip files and folders on Mac.