Sparewise vs WinDirStat, WizTree and TreeSize
Short answer: WinDirStat, WizTree and TreeSize show what is big. They are excellent at it, and free or cheap. Sparewise tries to answer the next question: is this safe to remove, and will it come back? Many people will want both.
Use a disk space analyzer when
- You want to see every folder and file on the drive by size. WizTree is the fastest at this; WinDirStat's treemap is a classic.
- The space is your own files: videos, photos, old projects, game installs. You know what they are; you just need to find them.
- You want to delete things yourself and do not need advice.
Sparewise helps more when
- The space is in folders you did not create and do not recognise:
.ollama,huggingface\hub,npm-cache,.gradle,ext4.vhdx. It says what each one is and whether it rebuilds by itself. - You want to know if something is safe to clear before you clear it. Only caches with a tested rule are offered, and everything goes to the Recycle Bin or is set aside.
- Space is inside something an analyzer cannot see into: Docker's reclaimable data, old model revisions next to new ones, WSL disks that never shrink.
- You want an AI assistant to help, within limits you set (Sparewise is also an MCP server).
Side by side
| Disk analyzers | Sparewise | |
|---|---|---|
| Every folder by size | Yes, their strength | Yes (Drive map), less detailed |
| Says what a folder is | Not their focus | Yes, for known developer, AI and Windows folders |
| Says if it is safe to remove | Not their focus | Yes, by tested rules |
| Deletes | Yes: to the Recycle Bin or permanently, your choice | Only to the Recycle Bin or set aside, never permanently |
| AI models, Docker, WSL | As plain folders and files | Model by model, Docker's own reclaimable figures, WSL disks |
| Open source | WinDirStat: yes. WizTree, TreeSize: no | No (free, no telemetry) |
| Platforms | Windows | Windows |