1
Upload Your OBJ File
Drag and drop your .obj file into the converter upload area. Our online OBJ to STL converter handles complex geometries and supports files up to 200 MiB.
Convert OBJ to STL Online
Convert OBJ to STL with browser-first processing. If local conversion fails or the export is unavailable in the browser, conversion automatically switches to the server with a private upload; sign-in is required.
Drag and drop OBJ file here or click to upload
Supported file format: .OBJ / ZIP / MTL / PNG / JPG / WEBP
Max file size: 200 MiB
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How to Convert OBJ to STL Online
Follow these 3 simple steps to convert your .obj file to .stl format without installing heavy 3D modeling software.
2
Fast Browser Conversion
Supported formats are converted in your browser first, including large models. Conversion automatically switches to the server with a private upload if local conversion fails, or for FBX and USDZ with skins or animation. Server conversion requires sign-in.
3
Download the STL File
Open the export options, choose STL, and click Export. When the result is ready, click Download to save it.
Optimized for 3D Printing
STL contains static triangle geometry, without color, textures or animation. Check millimeter dimensions and mesh suitability in your slicer; conversion does not repair the mesh automatically.
Browser first, server when needed
Supported formats are converted in your browser first, including large models. Conversion automatically switches to the server with a private upload if local conversion fails, or for FBX and USDZ with skins or animation. Server conversion requires sign-in.
Automatic private server fallback
Local previews and browser conversions keep file processing on your device. If local conversion fails or requires the server, the model is automatically uploaded to private storage; temporary uploads and results are cleaned up after 24 hours.
Accurate Geometry Extraction
STL contains static triangle geometry, without color, textures or animation. Check millimeter dimensions and mesh suitability in your slicer; conversion does not repair the mesh automatically.
Common Questions About OBJ to STL Conversion
Find answers to common questions about converting .obj to .stl file formats for 3D printing.
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Ready to Convert OBJ to STL?
Convert OBJ to STL with browser-first processing. Conversion has no additional fee. Local file conversion does not require sign-in; server conversion does. Generation usage and existing download entitlements for generated assets still apply.
Trusted by 3D printing enthusiasts, makers, and engineers worldwide.
Private upload when needed
Up to 200 MiB
Browser first
🖨️ Ideal for Slicers