v2.2.0 Out Now

Reclaim Your Disk Space
At Warp Speed

eDirStat is a modern, high-performance, cross-platform disk usage analyzer written in Rust. Coupling a work-stealing multithreaded directory walker with a zero-copy arena data structure to scan millions of files in milliseconds.

100% open-source under the MIT license. Binaries available on the Mac App Store and itch.io.
Up to2.8x
Faster than WinDirStat
Up to2.5x
Faster than WizTree
Up to9.6x
Faster than QDirStat
100%
Safe & Native Rust

Experience the Speed

Interact with this real-time simulator showing how eDirStat maps and visualizes disk space.

Directory Explorer
Treemap Diagram

Cryptographic Deduplication

Visualize how eDirStat's 7-stage pipeline isolates duplicate files and calculates reclaimable space without unnecessary disk reads.

Pipeline Controller
1
Size Partitioning Grouping files by exact byte count. Singletons are discarded.
Idle
2
Prefix Hashing Hashing first 4KB to catch header or container differences.
Idle
3
Midpoint Hashing Hashing a 4KB chunk in the center of remaining files.
Idle
4
Suffix Hashing Hashing trailing 4KB to isolate tail metadata differences.
Idle
5
Multi-Range Hashing Periodic block sampling across files larger than 100MB.
Idle
6
Full BLAKE3 Hashing Full 256-bit cryptographic verification on remaining candidates.
Idle
7
Timestamp Validation Confirming last modified timestamps to protect against changes.
Idle
Active Sandbox Processing Stream & Live Logs

Deduplication Stream Ready

Click "Start Scan" to watch candidate files flow through our 7-stage filter system.

[SYSTEM] Engine online. Awaiting control signal.

Cross-Platform Performance

Real benchmarks comparing directory traversal times on different platforms and filesystems. Select a device drive to see the results.

SAMSUNG MZVLB512HBJQ PCIe SSD

Scanning Windows system directories containing deep system libraries and DLLs.
Benchmark Disclaimer & Configuration: Comparisons were conducted against WinDirStat v2.6.2, WizTree v4.31, and QDirStat v2.0.01 under controlled testing conditions with primed system caches, on their respective systems. eDirStat is an independent open-source utility and is not associated with, sponsored by, or endorsed by the trademark holders of those projects. Performance measurements depend heavily on hardware setup, filesystem fragmentation, operating system scheduling, and disk caching behavior; individual test results may vary.

Performance Drag Races

Watch eDirStat go head-to-head against WinDirStat, WizTree, and other tools in real-time speed comparisons.

WinDirStat vs eDirStat

A side-by-side speed comparison scanning a large directory structure. Watch how eDirStat's multithreaded directory walker completes the scan in seconds, while WinDirStat lags behind due to single-threaded layout traversal and locking issues.

WizTree vs eDirStat

Comparing raw traversal speed on local SSD storage. eDirStat utilizes advanced work-stealing scheduling to saturate all CPU cores, executing a near-instant walk that matches or exceeds disk-level direct scanners.

Architected for Extreme Performance

Every stage of eDirStat is optimized to eliminate bottlenecks and fully exploit modern hardware.

Work-Stealing Walker

Powered by a lock-free queue that saturates all available CPU cores. Idle threads steal directory branches to guarantee zero idle core overhead.

NTFS MFT Scanner

Directly accesses raw Windows NTFS handles to parse the Master File Table. Bypasses the OS filesystem abstraction layers for near-instant scanning.

7-Stage Deduplication

Deduplicates byte-for-byte identical files with minimal disk reads. Filters via size, hashes (prefix, midpoint, suffix), and validates in real-time.

Compressed Snapshots

Serializes directory state to a Zstd-compressed flat binary (`.edst` files). Once loaded and decompressed, casts directly via `bytemuck` to eliminate all parsing overhead.

Dynamic Visualizations

Cycles between layout modes, including interactive treemaps, directory composition charts, duplicate file composition, and timelines.

Bulk Operations

Select multiple nodes at once in the directory trees or the deduplicator to execute batch trashing, permanent deletions, or folder link creation.

Getting Started

Set up, compile from source, or run eDirStat directly on your operating system.

Run the graphical user interface from your terminal. You can pass a directory path as a positional argument to start scanning immediately:

# Run GUI with default setup
./edirstat

# Run GUI and immediately scan a directory
./edirstat /path/to/scan
Windows Tip: You can just double-click the executable on Windows, but run eDirStat as an Administrator to unlock maximum performance.

To compile eDirStat from source, make sure you have the Rust compiler and cargo nightly toolchain installed:

# Clone the repository
git clone https://github.com/xangelix/edirstat.git
cd edirstat

# Compile optimized release binary
cargo build --release
Platform Support: Fully supported on Linux, macOS, and Windows (requires nightly toolchain on Windows for `windows_by_handle`).
Engineering Blog & Releases

Latest Releases & Devlogs

Deep dives into architecture, multi-threaded disk traversal algorithms, and release notes.

View All Devlogs & Releases

Frequently Asked Questions

Everything you need to know about eDirStat licenses, security sandboxing, performance, and platform support.

What is the difference between the Mac App Store and itch.io editions? Can I switch between them?

The Mac App Store version runs inside Apple's mandatory App Sandbox, meaning it can only scan files and folders you explicitly grant it access to through the system file dialog — the itch.io version is not sandboxed and can scan any path directly. The App Store version is individually reviewed and approved by Apple and receives automatic updates through the App Store, while the itch.io version is Apple-notarized but distributed directly.

If you purchased the Mac App Store version and need the unrestricted build, email with your receipt and we'll provide the itch.io version at no additional cost — unfortunately, the reverse is not possible, as we cannot issue Mac App Store copies to itch.io customers at this time.

Does eDirStat collect any telemetry, analytics, or crash reports?

No. eDirStat is 100% offline, privacy-first software with zero telemetry, zero analytics, zero network beacons, and zero crash reporting SDKs. The Mac App Store binary is compiled without any network entitlements, making network access physically impossible at the OS kernel level. Your filesystem hierarchy, folder names, and drive contents remain strictly private on your computer.

How is eDirStat so much faster than WinDirStat, WizTree, and QDirStat?

eDirStat is engineered in safe, parallel Rust using a lock-free, work-stealing thread pool and zero-copy columnar arena allocations. On Windows NTFS drives, it queries the Master File Table (MFT) directly, bypassing standard Win32 recursive APIs. On macOS and Linux, it uses high-concurrency readdir batches optimized to saturate NVMe queue depths and modern SSD controllers.

How does the 7-Stage Duplicate Hunter work? Will it delete my files without permission?

Never. eDirStat never modifies or deletes any file without your explicit manual review and confirmation. The Duplicate Hunter identifies identical files using a 7-stage cryptographic pipeline: file size matching, prefix hashing, suffix hashing, sparse sampling, full Blake3 cryptographic verification, safety locks, and journal metadata confirmation. You can review all duplicate clusters in an interactive table and safely reclaim space using either hardlinks or permanent deletion.

What are the supported platforms and system requirements?

eDirStat runs natively across all major platforms:

  • macOS: Universal binary (native Apple Silicon M1/M2/M3/M4 & Intel x86_64) on macOS 12.0 (Monterey) and higher. Available on the Mac App Store and itch.io.
  • Windows: 64-bit Windows 10 & 11 with direct NTFS MFT acceleration. Available on itch.io.
  • Linux: Standalone binaries, AppImage, deb, and rpm packages supporting ext4, btrfs, xfs, and ZFS.
  • Web Viewer: In addition to desktop binaries, our Web Viewer lets you inspect and query exported .edst disk snapshot files directly in your browser with zero installation.
Can eDirStat scan external hard drives, USB drives, and network shares?

Yes. You can scan external hard drives, SSDs, USB flash drives, and mounted SMB/NFS network shares. On macOS, simply drag and drop any mounted volume or folder into eDirStat to grant security-scoped access immediately.

How do I get support, report bugs, or claim an itch.io key?

For general bug reports, feature requests, and community discussions, please visit our open-source GitHub Issues page.

For private purchase inquiries, receipt verification, or claiming your complimentary unrestricted itch.io build after purchasing on the Mac App Store, email .

Ready to Scan?

Download on the Mac App Store or get official cross-platform binaries directly on itch.io.

Download on the Mac App Store Download on itch.io

Want to Contribute?

eDirStat is fully open-source. Report issues, request features, or submit pull requests on GitHub.

Visit GitHub Repository