Capacitra is a fast, offline storage analyzer for Windows. Scan a terabyte drive in minutes and visualize it as a treemap, a folder tree, and crisp pie / bar charts, without a single byte leaving your machine.
Capacitra is an offline-first desktop tool. Everything, your folder names, file sizes, even the act of starting the app, stays on your computer. No telemetry, no crash reporting, no auto-update phone-home, no third-party SDKs. You install it once and it works forever, without ever talking to a server.
Verify it yourself. Capture network traffic while Capacitra runs, you'll see exactly zero packets to us.
Most disk analyzers are bloated, intrusive or paywalled. Capacitra is small, transparent, and respects your machine.
Everything runs locally. No telemetry, no cloud uploads, no third-party trackers. Your scan results never leave your device.
A multi-threaded scanning engine processes terabyte-scale volumes in minutes, with a live progress indicator and a responsive UI throughout.
A single .exe with no installer, no scheduled
tasks, no shell extensions, no background services. Put it on
a USB stick, run it on any Windows 10 / 11 machine, macOS and
Linux builds are on the way.
From a glanceable treemap to surgical duplicate detection Capacitra ships the tools that genuinely move the needle.
Tiles sized to the byte. Click to drill down, hover for details.
Distribution and largest-items views, sync'd to the selected folder.
Size-grouped pre-pass + SHA-1 verification. Reclaim wasted space.
See what's been untouched for years versus what changed last week.
Images, video, audio, docs, code, archives, grouped automatically.
Synthetic Free Space / Inaccessible tiles. The numbers add up.
Ctrl+O scan, Ctrl+E export, F5 rescan, Del recycle, Esc cancel.
CSV, HTML, PDF, Excel reports. Snapshots for compare-over-time.
The dashboard answers "what's on my disk?" in a glance, and the treemap turns every folder into a tile sized by bytes. Click any tile to drill down. Drag the splitter to resize.
Capacitra was designed so a tired sysadmin at 23:50 can recover gigabytes without reading a manual.
Capacitra lists every drive and mount point. Pick one or click Browse… to scan a specific folder.
A multi-threaded crawler walks every file. Browse the tree even while the scan is still running.
Treemap, charts, folder tree, top files, duplicates, all synced to the selected folder. Right-click → Recycle Bin.
Plenty of disk analyzers exist. Here's what we think makes Capacitra worth a download, versus the usual options you'll find on the market.
| Capability | Capacitra | Typical free disk analyzer | Typical paid disk analyzer |
|---|---|---|---|
| Treemap visualization | ✓ | ✓ | ✓ |
| Free for commercial use | ✓ | limited | licensed |
| Duplicate detection (SHA-1) | ✓ | ✗ | ✓ |
| Synthetic Free-Space tile | ✓ | ✗ | ✗ |
| Snapshot & compare scans | ✓ | ✗ | paid feature |
| PDF / Excel export | ✓ | PDF only | ✓ |
| No telemetry · 100% offline | ✓ | varies | varies |
| Single compact binary, no installer | ✓ | installer | installer |
| Price | Free | Free / limited | $$ |
Comparison is generic and meant to summarise common categories of disk-analysis software, not any specific product.
No sign-up. No newsletter. No bundled toolbar. Just a single file that runs.
Standalone .exe, no installer, no setup wizard.
Native macOS build is in progress. Want to be notified?
Notify me Apple Silicon & Intel · macOS 11+Packaged build for major distros is being prepared.
Notify me x86_64 · GTK / Qt · X11 & WaylandIf something here doesn't answer your question, write to info@capacitra.com. A single human reads every message.
Yes, for personal and commercial use. No locked features, no time-limited trial, no sign-up, no upsells. If it saves you time, that's already a win for us. Tell a colleague.
No. Capacitra runs entirely on your machine. There is no telemetry, analytics, crash reporter, A/B-testing SDK or auto-update phone-home. The only time it touches the network is if you point it at a network share to scan.
Yes, once installed, Capacitra never needs the internet. Pull your ethernet, switch off Wi-Fi, the app works exactly the same. The installer itself doesn't even require an account or activation key.
Nowhere by default. The download is a single, portable
Capacitra.exe. Drop it anywhere you like (desktop,
USB stick, network share) and double-click. No installer, no
registry keys, no background services, no scheduled tasks,
no drivers, no shell extensions. Removing the app means
deleting that one file.
Capacitra ships only what it needs. No bundled browser engine, no heavy media framework, no analytics SDK. The whole download is compact and starts in well under a second on a typical PC.
Yes. Capacitra is open about what it does and what it ships. A small number of antivirus engines occasionally flag new, unsigned single-file Windows applications with a generic heuristic label because the binary format is uncommon, not because they have found actual malicious behaviour.
You can verify the full scan report on VirusTotal at any time. The major vendors most users have installed (Microsoft Defender, Bitdefender, Sophos, ESET, Avast, Trend Micro, F-Secure) all report Capacitra as clean.
If your scanner is one of the few that flags the file, you can submit it as a false positive to your vendor (most process this within a few days), or add Capacitra.exe to your local exclusion list. We also submit clearance requests to vendors after each release.
The full source-of-truth: every Capacitra build is reproducible from the same code path, never includes telemetry, never calls home, never modifies the registry, and never installs a background service. The privacy policy and cookies policy describe exactly what does and does not happen.
Yes. Point Capacitra at a mapped drive letter or a UNC path like
\\server\share\folder. Scans run as fast as the share
allows. Results stay on your machine; nothing is uploaded.
The focus is a calm, modern dashboard that reports the way you want to read it: largest folders, oldest files, duplicates, breakdown by type, snapshots over time, and a smooth treemap. Plus a strict no-data, no-network stance that we don't compromise.
Capacitra follows directory junctions and reparse points only when you opt in from Settings, to avoid scanning the same content twice. Hardlinked files are counted once per logical path so the totals stay meaningful.
The most useful things you can do today are reporting bugs, suggesting features, and telling colleagues about the app. Honest feedback to info@capacitra.com shapes the roadmap more than anything else.
Maybe. Drop a line to info@capacitra.com with the use case. Roadmap is driven by what real users ask for, not by what looks good on a slide.
Email info@capacitra.com with the steps you took, your Windows version, and a screenshot if possible. Replies usually arrive within a couple of working days.
Yes. You may install it on any machines you own or operate, and you may share the unmodified installer internally. See the terms for the short legal version.
Capacitra