OmniDiskSweeper is a freeware disk space analyzer utility for macOS developed by The Omni Group, which recursively searches the filesystem and displays entries sorted and color-coded by size, from largest to smallest.

[5][6] OmniDiskSweeper supports internal and external drives, and network volumes.

[9] The Omni Group relicensed it as freeware in 2009, stating a need to refocus on their other programs.

[10] Specialist outlets MacGeneration and Macworld describe it as a basic tool, useful to find large but unused files.

[2][3][11][12] The Register gave it a rating of 70/100, and included it in their 2010 selection of free essential Mac apps.