Disk utility · Windows & Linux

Gudrun — visualize your disk space

A treemap analyzer that scans a terabyte drive in seconds — with file sizes shown visually in proportion to the rest of the drive. The map fills in live while the scan runs, and anything you find can be deleted without leaving the view.

Download for Windows Portable zip Linux x64 Linux arm64 Buy — $15

Free 30 days · no feature limits · no account · no telemetry

Fast

Parallel scanner tuned for NVMe — big drives map in seconds, and the treemap fills in live while the scan runs.

A real treemap

Every rectangle is a file, sized by bytes. Zoom with Ctrl+wheel and small files un-aggregate as you go; hover anything for details; delete straight from the map.

No subscriptions

Sold once, owned forever — $15, no recurring billing. The trial runs 30 days, then a reminder appears; nothing locks. The app never phones home.

Yours

Windows and Linux builds. Dark, light, and Solarized themes; density presets; custom theme files.

See it in action

Animation: the treemap filling in live while a drive scan runs — Point it at a drive — the map fills in live.

Animation: zooming into the treemap with Ctrl+wheel, small files un-aggregating — Ctrl+wheel to zoom — files un-aggregate as you go.

Animation: right-clicking a rectangle in the treemap and deleting the file — Found what's taking the space? Delete it from the map.

How the license works

Buying gets you a small signed file, gudrun.key. Drop it next to the executable (or import it from the reminder dialog) and Gudrun is licensed on that machine forever — fully offline, valid for all 1.x updates. That's the whole system. More in the FAQ.