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fstl-eMayo
Free

Free and open source under the MIT licence.

 Free

Free and open source.

Linux Windows, macOS, Linux
  • Opens STL files quickly
  • Configurable background
  • Converts between STEP, IGES, STL and other CAD formats
  • Clip planes, exploded views and measurement
  • Viewer only, no editing
  • Small fork maintained by one developer
  • A viewer and converter, not a modelling tool
Downloadable app Downloadable app
Open source Open source
License: MIT License not stated
No account needed No account needed
Works offline Works offline

Checked October 1, 2026

Checked September 23, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.