Open Source Windows Disk Space Analyzers
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Disk Space Analyzers for Windows
View 72 business solutionsBrowse free open source Disk Space Analyzers and projects for Windows below. Use the toggles on the left to filter open source Disk Space Analyzers by OS, license, language, programming language, and project status.
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CrystalDiskInfo
A HDD/SSD utility software
A HDD/SSD utility software which supports a part of USB, RAID and NVMe. -
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CrystalDiskMark
A simple disk benchmark software
A simple disk benchmark software. -
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HWiNFO
Comprehensive Hardware Analysis, Monitoring and Reporting for Windows
Professional System Information and Diagnostics. Comprehensive Hardware Analysis, Monitoring and Reporting for Windows and DOS. HWiNFO is an all-in-one solution for hardware analysis and monitoring supporting a broad range of OSes (DOS, Microsoft Windows 95 - Windows 11, WinPE) and platforms (i8086 - Xeon Platinum). Exhausting information about hardware components displayed in hierarchy unfolding into deep details. Useful for obtaining a detailed hardware inventory report or checking of various hardware-related parameters. Real-time monitoring of a variety of system and hardware parameters covering CPUs, GPUs, mainboards, drives, peripherals, etc. Useful for detection of overheating, overload, performance loss or failure prediction. Full hardware hierarchy, or quick summary overview. Export into XML, CSV, HTML reports. System monitoring in customizable tables, graphs, tray icons, OSD. -
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SpaceSniffer
Find lost disk space the easy way
SpaceSniffer is a freeware (donations are welcome) and portable tool application that lets you understand how folders and files are structured on your disks. By using a Treemap visualization layout, you have immediate perception of where big folders and files are placed on your devices. Treemap concept was invented by Prof. Ben Shneiderman, who kindly permitted the use of his concept into this tool. -
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WinDirStat: Windows Directory Statistics
A disk usage statistics viewer and cleanup tool for Windows
WinDirStat (Windows Directory Statistics) is a disk usage statistics viewer and cleanup tool for Windows. On start up, WinDirStat reads the whole directory tree once and then presents it in three useful views. The official download location and collaboration platform for WinDirStat has moved to GitHub: https://github.com/windirstat/windirstat Downloads and source code provided on SourceForge may not always be up to date. They are primarily used for disaster recovery purposes. -
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WizTree
WizTree quickly analyzes disk space, showing large files and folders.
WizTree is an ultra-fast and intuitive disk space analyzer that helps you instantly see what’s taking up space on your hard drives. Using advanced technology, it reads the Master File Table (MFT) directly on NTFS drives, making it dramatically faster than traditional scanners. The program displays your files and folders in a clear, visual tree-map view, showing their relative sizes so you can quickly locate and delete large or unnecessary items. -
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QDirStat
Qt-based directory statistics
Qt-based directory statistics: KDirStat without any KDE -- from the author of the original KDirStat. QDirStat is a graphical application to shows where your disk space has gone and to help you to clean it up. This is a Qt-only port of the old Qt3/KDE3-based KDirStat, now based on the latest Qt 5. It does not need any KDE libs or infrastructure. It runs on every X11-based desktop on Linux, BSD and other Unix-like systems and of course in a Docker container. -
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Windows Cleaner Utility
A windows batch script that cleans your PC from temporary files
A Windows batch script that cleans your PC from temporary files. If you've been a Windows user for a long time without cleaning it up, or you don't know how to clean it, you will be amazed of how much space this tool can free for you! Just download "WindowsCleanerUtility.bat" or "WindowsCleanerUtility-x86_64.exe" from Releases and right click on it and select run as administrator. Choose any option from the meun provided. -
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spaceman
Treemap disk usage analyzer: In search of lost space
Treemap disk usage analyzer: In search of lost space (a.k.a. wata-analyzer) -
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MangoDisk
Open-source disk cleaner for Windows, macOS and Linux
MangoDisk is a free, open-source disk cleaner for Windows, macOS and Linux. Find caches, large files, exact duplicates and app leftovers without digging through hidden folders. Explore disk usage with nested treemaps or a sunburst chart to see which folders take up the most space. Privacy Cleanup lets you review supported browser, app and system activity by time range. Clearing cookies can sign you out of websites. Also included: app uninstall, startup management, system optimization, common repair tools and an operation history. The resource panel shows CPU, memory, network and disk activity. Scans run locally and don't delete files. Choose what to remove and confirm before cleanup. No signup or login is required. Unsure about a file or an app? Optional online AI explanations cover cleanup items, startup entries, large files, duplicates and app uninstall. They explain purpose, impact and cautions; they don't delete files or replace your judgment. -
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Big File Finder (BFF)
Program to find (all) files above a size at a target dir
Big File Finder, a simple program to find (all) files above a size at a target dir. -
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ncdu
Ncdu is a disk usage analyzer with an ncurses interface
Ncdu is a disk usage analyzer with an ncurses interface. It is designed to find space hogs on a remote server where you don’t have an entire graphical setup available, but it is a useful tool even on regular desktop systems. Ncdu aims to be fast, simple and easy to use, and should be able to run in any minimal POSIX-like environment with ncurses installed. -
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Sadeaner
Sadeaner is a good tool for cleaning up the PC
Sadeaner is a powerful and efficient tool for cleaning your PC. It offers a wide range of useful functions, such as the ability to remove unnecessary files and folders, free up valuable disk space, and improve the overall performance of your system. This makes it an excellent choice for gamers, as it can help to free up resources and improve the performance of games. Additionally, Sadeaner will also include advanced features such as a registry cleaner, startup manager, and browser cleaner, which can help to keep your system running smoothly and efficiently. -
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c² flux is an ultra-fast Windows disk space analyzer. Its high-speed scanning engine reads NTFS metadata directly from the Master File Table (MFT) and uses native Windows NT directory APIs as a fallback, avoiding slower file-by-file access whenever possible. Results are shown in sortable tree, table, pie and bar chart views and can be saved, loaded, exported or copied to the clipboard.
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DiskGeek
Free disk space analyser for Windows — no ads, no bloat
DiskGeek scans your drives and shows exactly what's eating your space, with a sortable list view and a treemap view. It finds exact duplicates (SHA-256) and near-duplicate / visually similar images using perceptual hashing, with full-text search across scan results and batch rename. Snapshot comparison shows what changed between scans over time, and scheduled, unattended scans can run from the command line for ongoing monitoring. Includes NTFS permission auditing plus CSV/HTML export. No installer bloat, no bundled offers, no telemetry, no Pro tier or upsells — 100% free. Requires Windows 10 or 11 (64-bit). Self-contained installer bundles .NET 8, ~32 MB download. -
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ExtremeCleaner
Finds forgotten caches and shows how to free up disk space.
ExtremeCleaner is an essential tool for managing disk space usage. It goes beyond simple cache clearing to identify other space-hungry items: large AI models (Ollama, LM Studio), old game saves and Minecraft worlds, forgotten downloads and videos, virtual machine images, email databases, call recordings, Spotify and video editor caches, and outdated software versions. It features three tabs: safe cleanup (moving files to the Recycle Bin), files for manual review, and system locations (hibernation files, WinSxS, restore points, update caches)—complete with instructions on how to reduce their size if desired. Each item comes with an explanation of what it is and whether it is safe to remove. If you have a small SSD that is constantly running out of space, this tool solves the problem: it regularly identifies what can be safely removed and shows exactly where your storage is going. github.com/AIgrator/ExtremeCleaner. -
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Disk Drives Informations
Display information for disk drives. Require Ascoos Framework 24
This package displays a list of the disk drivers you have on your system. Creates a box-style formatted table that displays both the disk and the total, used, and free space on it. You can easily integrate it into any code as long as you follow the instructions below in the details and have Ascoos Framework 24 installed. -
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SpaceSharp
Open-source Windows disk space analyzer with interactive treemaps
SpaceSharp is a free, open-source disk space analyzer for Windows 10 and 11, inspired by SpaceMonger. It scans an entire drive or a selected folder and draws it as an interactive, zoomable treemap: every folder is a frame, every file a box sized by the space it uses, so the big things stand out at a glance. NTFS drives are read straight from the file table, so a million files take seconds. Features include a filter drawer with file types, size, age and presets, a panel showing space by type, places that are safe to clear and when files last changed, saved scans with a view of what changed since last time, fifteen palettes and adjustable shading with a live preview, dark and light themes with five looks each, size-on-disk measurement, hard-link detection, CSV export and a command line. Files can be opened in Explorer or sent to the Recycle Bin from the map. Portable and installable builds for 64-bit and 32-bit Windows. MIT License, actively developed on GitHub. -
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MyDisk
Storage and disk utility and logger
Windows storage device utility logger and info viewer. This app allows you to view, and log data about your mounted storage devices! -
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SpaceScan
Free disk space analyzer: reads the NTFS MFT, maps a drive in seconds.
aSpaceScan is a free, open-source disk space analyzer for Windows 10 and 11. It finds what is filling up a drive. On NTFS it reads the Master File Table directly, so a whole drive, a 10 TB one included, is mapped in seconds. A folder tree with size bars, percentages and file counts; file types, and the same totals grouped into categories; the largest files, and search by name, size or age; a duplicate finder with the space you would get back. Every scan is stored automatically, so a scan can be compared with an earlier one to see what grew. Delete, copy and move from the results, several items at once. HTML and CSV export, exclusion rules, and a command line for scheduled reports. Right-click integration for Explorer and File Labs. Per-user installer, no UAC prompt; reading the MFT needs administrator rights, which the app asks for only when a scan needs them. No account, no telemetry. MIT licence. -
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Little Disk Cleaner
Free up valuable disk space
Little Disk Cleaner is a open source program written in C# that removes any unneeded files to free up extra hard drive space and make windows run faster. -
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BazWare FLF (Find Large Folders)
Find that huge folder that you didn't know it was there
Are you tired of being unable to find what is using up precious hard disk space? Find that huge folder that you didn't know it was there. Select drive and press start to go through directories manually. Click the refresh button to calculate folder size, double-click to the folder name, or press "+" button to see sub folders. Deleting a folder is possible by clicking the bin button next to the folder. Increase the maximum number of folders when required. (Using more than 10 is recommended for large folders such as Program Files). -
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BlitzTree
A fast, native disk-space treemap for macOS, in the spirit of WizTree
BlitzTree is a native macOS disk-space analyzer designed to visualize large file systems quickly through interactive treemaps. Its Rust scanning engine can process millions of files while the SwiftUI and AppKit interface remains responsive. Users can switch between cushion-shaded rectangular treemaps and ring-based directory visualization. A synchronized outline view helps identify large folders and files, which can then be revealed in Finder or moved to Trash. The Clean Up panel detects common disposable data such as caches, node_modules, build outputs, and Xcode artifacts. Optional Claude Code or Codex integration can propose cleanup candidates, while BlitzTree itself enforces protected-path and confirmation rules. The app currently requires Apple Silicon and macOS 14 or newer and includes a read-only JSON CLI for scripting. -
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Disk space checker
An application that controls disk drive space
The application checks each drive for free space and compares them with the threshold values designated by the user. If they are below threshold, it sends out mail to the designated addresses. Application includes two projects; a configuration form and a windows service. Service triggers every hour and sends mail if the conditions are met.
