Defragger

Defragger is ranked #19 of 22 in disk defragmentation software on The Geeks Club. It runs on Linux. There is a free plan.

Defragger plans and pricing

Open-source Free Alpha software · Linux only · ext4 and offline FAT16/FAT32 write support github.com · 4 Oct 2026

Compared on disk defragmentation software

Filesystem support: multi-filesystem

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Defragger

Purpose: Defragger is a graphical Linux filesystem defragmenter that visualizes file, free-space, and metadata allocation.
Analysis: It analyzes fragmentation and displays an adaptive filesystem block map.
Read-only formats: FAT12 and exFAT support analysis only; neither is writable.
CLI: The project includes a command-line interface for listing, analyzing, defragmenting, and compacting volumes.
Privilege handling: The GUI and CLI run unprivileged, with elevated operations handled by a PolicyKit-authorized helper over D-Bus.
Data safety: The README warns that the software is alpha, recommends backing up important data, and says ext4 has received the most testing.
FAT caution: FAT write support is newer and the README recommends first using it with disposable or fully backed-up volumes.
Linux requirements: The stated environment is Linux with Qt 6 and KDE Kirigami, while privileged mode requires systemd, PolicyKit, and an active graphical PolicyKit agent.
Integrations: For ext4 operations, Defragger uses Linux filesystem ioctls directly and says it does not shell out to e4defrag or filefrag.
License: Defragger is dual-licensed under MIT or Apache License 2.0.
Support: The repository exposes GitHub Issues, which showed zero open issues when viewed.
Maker: The README credits copyright 2026 to Guillaume Binet, and the maker's GitHub profile lists Austin, TX.
Price from: Free

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Where it ranks on The Geeks Club

Best Disk Defragmentation Software in 2026#19 of 22

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Sources

github.com/gbin/defragger· checked 4 Oct 2026
github.com/gbin· checked 4 Oct 2026