SpaceFree is the storage debugger for developers. Find gigabytes trapped by WSL2/Docker virtual disks that grow but never shrink, plus npm, pip, conda, nuget, cargo, and IDE caches. One-click VHDX compaction reclaims real disk space safely. Every scan result shows a plain-language explanation, safety tier, and rebuild steps before you delete anything - nothing is removed automatically. Deletions go to the Recycle Bin by default, with a full audit log of every action.