Gudrun
See what's eating your disk. A fast treemap disk-usage analyzer for Windows and Linux — scan a terabyte drive in seconds, zoom into the map, delete what you don't need.
Free 30-day trial. No feature limits, no account, no telemetry.
Why Gudrun
- Fast. Parallel scanner tuned for NVMe — big drives map in seconds, and the treemap fills in live while the scan runs.
- A real treemap. Zoom with Ctrl+wheel and small files un-aggregate as you go; hover anything for details; delete straight from the map.
- Honest licensing. 30-day trial, then a reminder — nothing locks. A $15 license removes the reminder forever. The app never phones home.
- Yours. Windows and Linux builds. Dark, light, and Solarized themes; density presets; custom theme files.
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.