Disk space analyzer · Windows & Linux

Gudrun — visualize your disk space

A treemap disk space 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, so what's taking up space is obvious at a glance — and anything you find can be deleted without leaving the view.

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

Version 1.1.2 · Free 30 days · no feature limits · no account · no telemetry

Gudrun's treemap of a scanned C: drive: Steam games, user folders and Windows as nested rectangles, each file sized by bytes — A scan of C: — 436 GB across 183,814 items, every rectangle a file sized by bytes.

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

Ctrl+wheel to zoom — files un-aggregate as you go.

Found what's taking the space? Delete it from the map.

Point it at a drive — the map fills in live.

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 updates. That's the whole system. More in the FAQ.