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Software · 3D, CAD & electronics

F3D

A fast and minimalist 3D viewer.

  • Completely free
  • Windows and Linux
  • Open source
  • No account

Overview

Features described in its GitHub repository and on its official website: keyboard shortcuts and hardware acceleration.

File formats mentioned: STL, FBX and GLTF.

Overview written by LicitPro from the documentation published by the authors and the cited sources; we have not tried the resource ourselves.

Excerpts that establish this information
  • “It supports interactive hotkeys, drag and drop, and integration into file managers.” — GitHub, 10 November 2026
  • “Show animations, with GPU accelerated skinning for a smooth and efficient playback of complex character rigs.” — official website, 10 November 2026

At a glance

F3D is completely free: it is open source software, and every feature is available without paying or subscribing.

Its licence (BSD-3-Clause) is a permissive open source licence: use, modification and redistribution are allowed, including in commercial projects.

Strengths

  • Open source code
  • No account needed
  • Commercial use allowed

About

A VTK-based 3D viewer following the KISS principle, so it is minimalist, efficient, has no GUI, has simple interaction mechanisms and is fully controllable using arguments on the command line.

Description from Flathub — AppStream (Flathub)

Sources and checks

  • Facts collected from Flathub (credit card, publisher, licence, free status, platforms, commercial use, version) —
  • Facts collected from Official plan pages (pricing, licence, terms) (commercial use) —
  • Facts collected from Winget (Windows Package Manager) (credit card, account, source code, publisher, licence, free status, platforms, commercial use, version) —
  • Last technical check: 6 November 2026
  • Description from Flathub — AppStream (Flathub)

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