ncdu

Spec sheet

Purpose

ncdu is a text-mode disk usage analyzer designed to find space hogs, including on remote servers without a graphical setup.Read 8 Oct 2026 · dev.yorhel.nl

Platforms

The maker lists Linux static binaries and packages for Linux, BSD, AIX, Solaris, macOS, and other systems, plus a Windows binary from another site.Read 8 Oct 2026 · dev.yorhel.nl

Free plan

YesRead 23 Sep 2026 · dev.yorhel.nl

Support

The maintainer welcomes bug reports by issue tracker or email but makes no promise to act on feedback or fix every bug.Read 8 Oct 2026 · dev.yorhel.nl

License

The software is distributed under the MIT license.Read 8 Oct 2026 · dev.yorhel.nl

Application sizes

NoRead 23 Sep 2026 · dev.yorhel.nl

Build requirements

The listed Zig version requires Zig 0.14 or 0.15, and the maker cautions that the Zig language and compiler are somewhat unstable.Read 8 Oct 2026 · dev.yorhel.nl

Compatibility limits

The maintainer says users combining the software with proprietary software or operating systems such as macOS or Windows are mostly on their own for support.Read 8 Oct 2026 · dev.yorhel.nl

Export formats

It can export directory trees as JSON or in a compressed binary format that supports browsing trees too large to fit in memory.Read 8 Oct 2026 · dev.yorhel.nl

Exportable reports

YesRead 23 Sep 2026 · dev.yorhel.nl

External drive scans

YesRead 23 Sep 2026 · dev.yorhel.nl

File actions

The browser can delete files and directories, refresh directory data, and spawn a shell; delete and shell actions can be disabled.Read 8 Oct 2026 · dev.yorhel.nl

File-type breakdown

NoRead 23 Sep 2026 · dev.yorhel.nl

Interface

It provides an interactive curses-based view of which directories use disk space.Read 8 Oct 2026 · dev.yorhel.nl

Read-only mode

The manual documents a read-only option that disables deletion, and with a second occurrence also disables shell spawning.Read 8 Oct 2026 · dev.yorhel.nl

Scan scope

files_foldersRead 23 Sep 2026 · dev.yorhel.nl

Scanning

Version 2.5 added parallel scanning, which is disabled by default and can be enabled with a thread count option.Read 8 Oct 2026 · dev.yorhel.nl

Treemap view

NoRead 23 Sep 2026 · dev.yorhel.nl

Version choices

The site lists a Zig-based stable version and a maintained C-based LTS version; it says the C branch lags in features and performance.Read 8 Oct 2026 · dev.yorhel.nl

Web export browser

The linked export browser accepts ncdu JSON, compressed JSON, and binary export files; uploads are visible to anyone with the URL and expire after 30 days.Read 8 Oct 2026 · ncdu.blicky.net

Plans and prices

Every ncdu plan and price →

Where Specifiction places it

• Disk Cleanup Software#6 of 228.3
• Disk Space Analyzers#34 of 1058.2