Free Online OBJ to STL Converter
Choose an .obj file and export its mesh geometry as a binary .stl locally in your browser. External MTL files, textures, and colors are not included.
Choose Your 3D Model
Drag and drop your file here or click to choose
- Local browser processing
- Files stay on your device
- Unlimited conversions
- Maximum file size: 50 MB
The output STL contains mesh geometry only. External MTL files, textures, and colors are not transferred, and conversion does not repair invalid geometry.
Convert OBJ to STL locally in your browser without installing software or creating an account. Your source file stays on your device throughout the conversion. You can make unlimited conversions, with a maximum source-file size of 50 MB. The output contains the mesh and scene data supported by STL, so review the converted file in your target software before using it in a production workflow.
OBJ can store mesh geometry, normals, texture coordinates, and references to external material files. This converter reads the selected OBJ file and exports its mesh geometry as a binary STL locally in your browser. External MTL files, textures, colors, and unsupported data are not included. Review the result in your slicer before printing.
How to Convert · OBJ → STL
Choose Your OBJ File
Choose the file area or drag and drop your OBJ file to begin. Files up to 50 MB are processed locally in your browser and are never sent to a server.
Convert OBJ to STL
Click the Convert button to read the supported data in your OBJ file and export it in STL format. Processing time depends on the file size, mesh complexity, and available browser memory.
Download Your STL File
When conversion finishes, download the new STL file to your device. Open it in your target software to review the geometry, scale, materials, and other format-dependent data before continuing your workflow.
Why Choose Our Converter
Fast OBJ to STL Conversion
Our OBJ to STL converter processes files quickly using advanced algorithms specifically optimized for OBJ to STL conversion. Convert your OBJ files to STL format in seconds, not minutes. The OBJ to STL conversion engine handles even complex 3D models with thousands of polygons efficiently and accurately.
Check the exported model
Only data supported by the loader and output format can transfer. Inspect the result in your target application; conversion does not repair a mesh or certify it for printing.
Browser-Based OBJ to STL
No software download or installation needed for OBJ to STL conversion. Our converter runs entirely in your web browser for maximum privacy, security, and convenience. Your OBJ files never leave your computer during the OBJ to STL conversion process - everything happens locally.
100% Free OBJ to STL Converter
Make unlimited OBJ to STL conversions with no registration or watermark. Each source file can be up to 50 MB, and all processing runs locally in your browser.
Format Comparison
Wavefront OBJ
OBJ is a simple, widely-supported 3D model format. OBJ files store geometry data including vertices, normals, and texture coordinates. OBJ format is compatible with most 3D software.
- Text-based format
- Supports texture coordinates
- Material file support (.mtl)
- Human-readable
- Wide software support
Stereolithography
STL is the standard format for 3D printing. STL files describe only the surface geometry of 3D objects without color or texture. STL format is essential for 3D printing workflows.
- Binary or ASCII format
- Geometry only
- Optimized for 3D printing
- Smaller file size
- Universal printer support