File Compressors

7-Zip

File archiver with a high compression ratio: creates 7z and zip, and extracts almost everything. Linux and macOS get the command-line version.

You can hardly get better than this for a file compression app. It just works and opens everything.

Keka

The file archiver for Mac. Creates and extracts 7z, zip, rar, tar and lots more.

It’s weird that macOS has the Preview app, which even opens 3D model files like .obj, but can’t handle .rar files. At least this app exists.