# STL Mesh

> Free in-browser 3D file tools: view and convert STL, GLB, 3MF, OBJ, FBX, PLY, DAE, AMF and SVG models. Export to STL, GLB, OBJ, 3MF, PLY and USDZ. Everything runs locally with WebGL — files are never uploaded.

Key facts:
- All parsing, preview and conversion happens client-side (three.js); there is no upload endpoint.
- Converting to STL keeps geometry exactly but drops colors/materials, because STL stores only triangles.
- STL numbers carry no unit; slicers assume millimeters. glTF counts meters — a common 1000x import-size mismatch.
- 3MF is a ZIP archive containing XML (3D/3dmodel.model); slicers use it as their project format.

## Converters — to STL
- [GLB to STL Converter](https://stlmesh.com/glb-to-stl): print AI-generated models (Meshy, Tripo, Luma) and web assets
- [3MF to STL Converter](https://stlmesh.com/3mf-to-stl): extract the plain mesh from a slicer project
- [OBJ to STL Converter](https://stlmesh.com/obj-to-stl): sculpts, scans and classic assets to printable STL
- [FBX to STL Converter](https://stlmesh.com/fbx-to-stl): animation and game assets to printable mesh
- [GLTF to STL Converter](https://stlmesh.com/gltf-to-stl): web 3D models to printable STL
- [PLY to STL Converter](https://stlmesh.com/ply-to-stl): scanner meshes to slicer-ready STL
- [SVG to STL Converter](https://stlmesh.com/svg-to-stl): extrude vector art into printable 3D
- [DAE to STL Converter](https://stlmesh.com/dae-to-stl): Collada files to printable STL
- [AMF to STL Converter](https://stlmesh.com/amf-to-stl): ISO/ASTM additive manufacturing files to STL

## Converters — from STL
- [STL to GLB Converter](https://stlmesh.com/stl-to-glb): web-ready, AR-ready binary glTF
- [STL to OBJ Converter](https://stlmesh.com/stl-to-obj): for editors and marketplaces that prefer OBJ
- [STL to STEP Converter](https://stlmesh.com/stl-to-step): mesh to CAD-openable STEP solid, coplanar triangles merged into flat faces
- [STL to 3MF Converter](https://stlmesh.com/stl-to-3mf): modern slicer format with metadata support
- [STL to PLY Converter](https://stlmesh.com/stl-to-ply): Stanford Triangle Format for MeshLab and scanning pipelines
- [STL to USDZ Converter](https://stlmesh.com/stl-to-usdz): Apple AR Quick Look on iOS, iPadOS and visionOS
- [STL to FBX Guide](https://stlmesh.com/stl-to-fbx): convert print files to game engine format (Blender workflow)

## Cross-format converters
- [FBX to OBJ Converter](https://stlmesh.com/fbx-to-obj): game assets to universal mesh format
- [FBX to GLB Converter](https://stlmesh.com/fbx-to-glb): game assets to web-ready 3D
- [OBJ to GLB Converter](https://stlmesh.com/obj-to-glb): mesh files to web viewer format

## Tools
- [STL Viewer](https://stlmesh.com/): open STL/GLB/3MF/OBJ/FBX/PLY/DAE/AMF/SVG, inspect triangles, vertices and bounding box
- [Image to STL](https://stlmesh.com/image-to-stl): PNG/JPG to printable relief or lithophane, watertight solid output
- [PNG to STL](https://stlmesh.com/png-to-stl): PNG heightmap to printable STL
- [JPG to STL](https://stlmesh.com/jpg-to-stl): photograph to lithophane or relief STL
- [STL Repair & Checker](https://stlmesh.com/stl-repair): watertightness, holes, non-manifold edges, basic repair
- [Reduce STL File Size](https://stlmesh.com/reduce-stl): simplify mesh to reduce triangle count
- [STL Editor](https://stlmesh.com/stl-editor): basic mesh transforms (scale, rotate, mirror)
- [STL to G-code Guide](https://stlmesh.com/stl-to-gcode): how to go from STL to sliced G-code
- [STEP to STL Guide](https://stlmesh.com/step-to-stl): converting CAD STEP files to mesh

## Format guides
- [What is an STL file?](https://stlmesh.com/what-is-stl-file): binary vs ASCII, units, what the format cannot store
- [What is a 3MF file?](https://stlmesh.com/what-is-3mf-file): the ZIP+XML format, the 3MF Consortium, 3MF vs STL
- [What is a GLB file?](https://stlmesh.com/what-is-glb-file): binary glTF container, materials, web/AR usage
- [What is an OBJ file?](https://stlmesh.com/what-is-obj-file): Wavefront OBJ, vertices/faces/UVs, MTL sidecar
- [What is a USDZ file?](https://stlmesh.com/what-is-usdz-file): Apple AR Quick Look format, Pixar USD packaging
- [What is an FBX file?](https://stlmesh.com/what-is-fbx-file): Autodesk's 3D interchange format for animation and games

## Format comparisons
- [STL vs 3MF](https://stlmesh.com/stl-vs-3mf): feature comparison and when to use each format
- [STL vs OBJ](https://stlmesh.com/stl-vs-obj): triangle-only vs full mesh with UVs and materials
- [OBJ vs FBX](https://stlmesh.com/obj-vs-fbx): open static mesh vs proprietary animated format
- [GLB vs GLTF](https://stlmesh.com/glb-vs-gltf): same format, different packaging — when to use each

## About
- [About STL Mesh](https://stlmesh.com/about): who runs the site and its local-first principles
- [Privacy](https://stlmesh.com/privacy): what analytics run and why model files never leave your device