GrandPerspective is a tool that shows the disk usage within a file system.

It can help you to manage your disk, as you can easily spot which files and folders take up the most space.

It uses a so-called tree map for visualisation. Files in the same folder appear together, but their placement is otherwise arbitrary. Each file is shown as a rectangle with an area proportional to the file's size.

Here are some key features of "GrandPerspective":

· Disk usage visualisation by way of tree maps

Configurable display of views:
· Choice of color mapping schemes
· Choice of color palettes
· Configurable mapping by file type
· Optionally hide specific files by way of a mask
· Optionally view the entire volume

· Convenient navigation of views: Traverse up and down the folder hierarchy, Select files and folders in the view
· Reveal files and folders in the Finder
· Delete files and folders from the view
· Multiple view support: Re-scan a view to compare results before and after clean-up, Twin or duplicate a view for different displays of the same data, Filter a view to focus on specific files
· Configurable user preferences
· Generate images from views
· Snappy and responsive GUI: Optimized drawing of views, Drawing and scanning are carried out in background threads
· Small memory and disk footprint
· Fully internationalized: Localizations available in English, Japanese, German, Spanish, French and Dutch
· Extensive help documentation
· Available as a Universal Binary