.stl file: how to open it on Windows

19 Windows apps register the .stl extension. Install one of them to open the file with a double-click.

About the format

Format: STL 3D model
Abbreviation: STL · StereoLithography
MIME type: model/stl
PRONOM identifier: x-fmt/108, fmt/865, fmt/1940

Format data: freedesktop.org shared-mime-info and PRONOM (The National Archives, UK).

Subtitle Edit
Subtitle Edit is a free and open source editor for video subtitles.

Open source 5.3.0.0 96.1K ↓ ★ 14.7K
PrusaSlicer
An Open Source 3D model slicer

Open source 2.9.6 82.3K ↓ ★ 9.4K
MeshLab
The open source mesh processing system

Open source 2025.07 36.1K ↓ ★ 5.9K
Ultimaker Cura
3D printer / slicing GUI built on top of the Uranium framework

Open source 5.13.0 197.7K ↓ ★ 7.1K
FreeCAD
A general purpose open source parametric 3D CAD modeler

Open source 1.1.4 ★ 34.6K
Creality Print
A self-developed Fused deposition modeling slicing software produced by Creality.

Open source 7.3.0 3.3K ↓ ★ 581
ideaMaker
An Advanced Slicing Software for AM Production

Proprietary 5.5.0.8810 30.4K ↓
LycheeSlicer
A powerful and versatile Slicer for Resin and Filament 3D Printers

Proprietary 7.6.7 1.6K ↓
Space Thumbnails
Generates preview thumbnails for 3D model files.

Open source 1.0.1 ★ 509
fstl
A fast STL file viewer.

Open source 0.11.0 ★ 599
Solarxy
3D model viewer, visual debugger, and validator

Open source 0.9.0 ★ 6
STL Renderer
High-performance STL to PNG converter with batch processing capabilities

Open source 1.0.0 ★ 15
PreForm
PreForm is the 3D printing software that prepares your models for printing on Formlabs 3D printers in just a few minutes.

Free 3.64.2.665
ODA Viewer
ODA Viewer incorporates the power and flexibility of ODA into a single application that can visualize all ODA supported file formats and illustrate other visualize-related features like visual styles and markup.

Free 27.9.0
HALOT BOX
A slicing software for light-curing 3D printers, independently developed by Creality.

Proprietary 4.6.1.4147
CRStudio
CR Studio is a scanner software by Creality for the CR-Scan series scanners. With powerful model processing capabilities, it supports both turntable and handheld scanning modes, and can export 3D models and point cloud data in STL, OBJ, and PLY formats.

Proprietary 2.5.14.0069
STL Viewer
A professional Windows application for viewing CAD models created or exported in STL (STereoLithography) file format from 3D systems

Free 2.3
MakerBot Print
Prepare, manage, and monitor 3D prints

Proprietary 4.10.1.2056
TinManX1
FibreSeek-focused 3D-printing slicer based on Orca Slicer.

Open source 2026.8.4.1