A free, portable disk usage analyzer for Windows — based on WinDirStat. Scan, visualize, and reclaim wasted space — no install required.
Everything you need to understand and manage your disk space.
Parallel enumeration with low-level Windows APIs scans drives at blazing speed.
Wildcard and regex name patterns, extension, size range, and date filters. Find exactly the files you're looking for.
Export scan results in CSV, TSV, JSON, Excel (.xlsx), or plain text. Share reports with your team or keep records.
Compare two directories side-by-side. See files unique to each location or changed between the two.
Color-coded rectangle visualization where each block is sized proportionally to disk usage. Click to explore any directory.
Concentric-ring visualization showing directory depth at a glance. The center is the root; each outward ring goes one level deeper.
3-phase detection — size grouping, quick hash, then full content hash — with smart resolution scoring and one-click cleanup.
Groups files by last-modified date into age buckets with visual bars. Quickly identify old files that may be safe to remove.
Monitor folders with configurable size thresholds. Get notified when a watched folder exceeds its limit.
Click any screenshot to view full size.
Interactive treemap with directory tree overview
Duplicate file detection with smart resolution
File age analysis with visual distribution
Powerful multi-criteria file search
Single portable executable. No installation, no dependencies — just download and run.
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Note: This application is not code-signed. Windows SmartScreen may show a warning on first launch. Click "More info" then "Run anyway" to proceed. You can verify the download integrity using the checksums above.
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