Which fits your needs?
GrandPerspective: People who want a free, inspectable treemap and reusable scan records.
SpacePeek: Finder users who want to inspect archives before extracting or deleting them.
Features, pricing, and workflow
Scroll across to compare
| Feature | GrandPerspective | SpacePeek |
|---|---|---|
| Best fit | People who want a free, inspectable treemap and reusable scan records. | Finder users who want to inspect archives before extracting or deleting them. |
| Visualization | Treemap with configurable colors and filters | Finder Quick Look folder/archive browser and size overview |
| Platforms and requirements | macOS 14+ (current release) | macOS 14+ |
| Pricing and editions | Free from SourceForge; the same app is $2.99 in the US App Store. | Free previews; optional $3.99 one-time Pro purchase in the US App Store. |
| Open source | Yes | No |
| Native macOS UI | Yes | Yes |
| Cleanup workflow | Delete files or folders from the view; review selection and deletion preferences. | Inspection and copying; use Finder or a separate cleanup tool for removals. |
| Reports and portability | Save the scan for reopening in GrandPerspective, or export text and images. NullDisk does not import GrandPerspective scan files; retain exports and rescan the same location. | SpacePeek previews existing folders and archives. Keep original archives and important paths; moving to NullDisk does not transfer Quick Look extension features. |
GrandPerspective: what stands out
A good fit for people who want a free, inspectable treemap and reusable scan records.
GrandPerspective: strengths
- Configurable colors, masks, searches, and scan exclusions
- Quick Look, Finder integration, and file/folder deletion
- Save/reload scans and export text or images
Considerations
- Treemap rather than radial navigation
- Older macOS versions require an older release
- App Store updates can follow SourceForge releases later
SpacePeek: what stands out
A good fit for Finder users who want to inspect archives before extracting or deleting them.
SpacePeek: strengths
- Preview and search folders plus ZIP, 7z, and RAR archives
- Folder-size overview without background indexing
- Pro adds deeper navigation and copying archive members
Considerations
- An inspection companion rather than a full-drive cleanup utility
- Free browsing stops after the first child level
- Pro archive copying is limited to 100 MiB per file
For a useful comparison on your own drive, match the scan root, access permissions, and size mode. Chart style changes how you explore the results; it does not by itself establish measurement accuracy.
Common questions
When should I choose GrandPerspective?
A good fit for people who want a free, inspectable treemap and reusable scan records. Free from SourceForge; the same app is $2.99 in the US App Store.
When should I choose SpacePeek?
A good fit for Finder users who want to inspect archives before extracting or deleting them. Free previews; optional $3.99 one-time Pro purchase in the US App Store.
Will both apps show the same size?
Not necessarily. Match the scan root, permissions, exclusions, and logical/allocated-size mode. Hard links, APFS clones, snapshots, sparse files, and cloud placeholders can change totals. A reported size is not a guaranteed amount recovered after deletion.