Suggestions appear as you type. Use the up and down arrows to choose one and Enter to open it.

This page's audience our own tag's counts — open to see them
–Visits
–Page views
–Clicks to vendors
–Time on page
–Reading now
Clicks to vendors, by tool
  • –
Top countries
  • –
Devices
  • –

– · visits, page views and clicks counted by our own tag, which counts more than our checked analytics; every figure rounded down · how we count

F3D review

Free#19 of 29 in 3D Model Viewer Software

A broad, free 3D viewer for CAD, scientific, medical, and point-cloud data.

7.0/10Editor score
Visit F3D
F3D7.0 Visit F3D

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

F3D is a free, open-source 3D visualization application for viewing, inspecting, rendering, and exporting 3D data. It is aimed at technical and scientific users working with CAD models, polygonal assets, animations, volumetric datasets, medical data, scientific visualizations, point clouds, and Gaussian splatting scenes. Interactive scene viewing, camera controls, realistic lighting, material rendering, animation playback, scalar coloring, and color maps cover a wide range of visualization tasks.

Platform fit is a major strength. F3D provides desktop software for Windows, macOS, and Linux, Android packages, and a browser-based WebAssembly viewer. It also supports command-line rendering, PNG export, file-manager thumbnailer integration, and library-oriented usage through Python, JavaScript, and API options. The published format support spans CAD formats such as STEP, IGES, BREP, IFC, and DXF; common 3D formats including OBJ, glTF, GLB, FBX, COLLADA, USD, and 3MF; scientific and medical formats such as VTK, NetCDF, DICOM, NRRD, and TIFF; plus many point-cloud and splat formats. That breadth makes it suitable for mixed technical workflows across desktop, browser, and development environments.

F3D is strongest when the priority is broad file compatibility and visual inspection rather than project collaboration or formal review. Its rendering, animation, volume, scientific, point-cloud, and Gaussian splatting capabilities give specialists substantial depth in the viewer itself. However, verified measurement, annotation, presentation, and sharing features are not part of its stated offering, so teams needing those workflows should consider a more review-oriented alternative. Choose F3D for free, open-source technical visualization across multiple platforms; avoid it when structured markup, presentation delivery, or shared review is central.

F3D pros and cons

  • Where it wins
    • Supports extensive CAD, scientific, medical, and 3D formats
    • Includes volume rendering, scientific visualization, and Gaussian splatting
    • Runs on Windows, macOS, Linux, Android, and web browsers
  • Where it doesn't
    • Measurement and annotation features are not part of its verified feature set
    • Presentation and sharing workflows are not part of its verified feature set
    • Its broad technical scope may exceed basic model-viewing needs

F3D fact sheet, pricing and score →

Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.

Last updated · How we research and update